/** vim: et:ts=4:sw=4:sts=4
 * @license requirejs 2.1.15 copyright (c) 2010-2014, the dojo foundation all rights reserved.
 * available via the mit or new bsd license.
 * see: http://github.com/jrburke/requirejs for details
 */
//not using strict: uneven strict support in browsers, #392, and causes
//problems with requirejs.exec()/transpiler plugins that may not be strict.
/*jslint regexp: true, nomen: true, sloppy: true */
/*global window, navigator, document, importscripts, settimeout, opera */

(function (global, document) {
    var pathname = global.location.pathname,
        pageurl = pathname;
    if (pathname.indexof(pathname) === 0) {
        pageurl = pathname.substr(global.ctx.length);
    }
    if(pageurl==="/"){
        pageurl = "/index";
    }
    var oajax = global.xmlhttprequest ? new xmlhttprequest() : new activexobject('microsoft.xmlhttp');
    oajax.open('get', global.basepath + '/system/security/getsessionattrsandnopermits?pageurl=' + pageurl + '&t=' + new date().gettime(), false);

    oajax.send();
    var result = function("return " + oajax.responsetext)();
    if (result.redirecturl) {
        // 未登录， 重定向，
        global.location.href = window.ctx + result.redirecturl;
    } else {
        global.sessionattrsandnopermits = result;
    }
    function getcookie(c_name) {
        var c_start, c_end;
        if (document.cookie.length > 0) {
            c_start = document.cookie.indexof(c_name + "=")
            if (c_start != -1) {
                c_start = c_start + c_name.length + 1;
                c_end = document.cookie.indexof(";", c_start);
                if (c_end == -1) c_end = document.cookie.length;
                return decodeuricomponent(document.cookie.substring(c_start, c_end));
            }
        }
        return ""
    }

    global.version = getcookie('gillion-res-version');
}(window, document));

var requirejs, require, define;
(function (global) {
    var req, s, head, baseelement, datamain, src,
        interactivescript, currentlyaddingscript, mainscript, subpath,
        version = '2.1.15',
        commentregexp = /(\/\*([\s\s]*?)\*\/|([^:]|^)\/\/(.*)$)/mg,
        cjsrequireregexp = /[^.]\s*require\s*\(\s*["']([^'"\s]+)["']\s*\)/g,
        jssuffixregexp = /\.js$/,
        currdirregexp = /^\.\//,
        op = object.prototype,
        ostring = op.tostring,
        hasown = op.hasownproperty,
        ap = array.prototype,
        apsp = ap.splice,
        isbrowser = !!(typeof window !== 'undefined' && typeof navigator !== 'undefined' && window.document),
        iswebworker = !isbrowser && typeof importscripts !== 'undefined',
    //ps3 indicates loaded and complete, but need to wait for complete
    //specifically. sequence is 'loading', 'loaded', execution,
    // then 'complete'. the ua check is unfortunate, but not sure how
    //to feature test w/o causing perf issues.
        readyregexp = isbrowser && navigator.platform === 'playstation 3' ?
            /^complete$/ : /^(complete|loaded)$/,
        defcontextname = '_',
    //oh the tragedy, detecting opera. see the usage of isopera for reason.
        isopera = typeof opera !== 'undefined' && opera.tostring() === '[object opera]',
        contexts = {},
        cfg = {},
        globaldefqueue = [],
        useinteractive = false;

    function isfunction(it) {
        return ostring.call(it) === '[object function]';
    }

    function isarray(it) {
        return ostring.call(it) === '[object array]';
    }

    /**
     * helper function for iterating over an array. if the func returns
     * a true value, it will break out of the loop.
     */
    function each(ary, func) {
        if (ary) {
            var i;
            for (i = 0; i < ary.length; i += 1) {
                if (ary[i] && func(ary[i], i, ary)) {
                    break;
                }
            }
        }
    }

    /**
     * helper function for iterating over an array backwards. if the func
     * returns a true value, it will break out of the loop.
     */
    function eachreverse(ary, func) {
        if (ary) {
            var i;
            for (i = ary.length - 1; i > -1; i -= 1) {
                if (ary[i] && func(ary[i], i, ary)) {
                    break;
                }
            }
        }
    }

    function hasprop(obj, prop) {
        return hasown.call(obj, prop);
    }

    function getown(obj, prop) {
        return hasprop(obj, prop) && obj[prop];
    }

    /**
     * cycles over properties in an object and calls a function for each
     * property value. if the function returns a truthy value, then the
     * iteration is stopped.
     */
    function eachprop(obj, func) {
        var prop;
        for (prop in obj) {
            if (hasprop(obj, prop)) {
                if (func(obj[prop], prop)) {
                    break;
                }
            }
        }
    }

    /**
     * simple function to mix in properties from source into target,
     * but only if target does not already have a property of the same name.
     */
    function mixin(target, source, force, deepstringmixin) {
        if (source) {
            eachprop(source, function (value, prop) {
                if (force || !hasprop(target, prop)) {
                    if (deepstringmixin && typeof value === 'object' && value && !isarray(value) && !isfunction(value) && !(value instanceof regexp)) {

                        if (!target[prop]) {
                            target[prop] = {};
                        }
                        mixin(target[prop], value, force, deepstringmixin);
                    } else {
                        target[prop] = value;
                    }
                }
            });
        }
        return target;
    }

    //similar to function.prototype.bind, but the 'this' object is specified
    //first, since it is easier to read/figure out what 'this' will be.
    function bind(obj, fn) {
        return function () {
            return fn.apply(obj, arguments);
        };
    }

    function scripts() {
        return document.getelementsbytagname('script');
    }

    function defaultonerror(err) {
        throw err;
    }

    //allow getting a global that is expressed in
    //dot notation, like 'a.b.c'.
    function getglobal(value) {
        if (!value) {
            return value;
        }
        var g = global;
        each(value.split('.'), function (part) {
            g = g[part];
        });
        return g;
    }

    /**
     * constructs an error with a pointer to an url with more information.
     * @param {string} id the error id that maps to an id on a web page.
     * @param {string} message human readable error.
     * @param {error} [err] the original error, if there is one.
     *
     * @returns {error}
     */
    function makeerror(id, msg, err, requiremodules) {
        var e = new error(msg + '\nhttp://requirejs.org/docs/errors.html#' + id);
        e.requiretype = id;
        e.requiremodules = requiremodules;
        if (err) {
            e.originalerror = err;
        }
        return e;
    }

    if (typeof define !== 'undefined') {
        //if a define is already in play via another amd loader,
        //do not overwrite.
        return;
    }

    if (typeof requirejs !== 'undefined') {
        if (isfunction(requirejs)) {
            //do not overwrite an existing requirejs instance.
            return;
        }
        cfg = requirejs;
        requirejs = undefined;
    }

    //allow for a require config object
    if (typeof require !== 'undefined' && !isfunction(require)) {
        //assume it is a config object.
        cfg = require;
        require = undefined;
    }

    function newcontext(contextname) {
        var incheckloaded, module, context, handlers,
            checkloadedtimeoutid,
            config = {
                //defaults. do not set a default for map
                //config to speed up normalize(), which
                //will run faster if there is no default.
                waitseconds: 7,
                baseurl: './',
                paths: {},
                bundles: {},
                pkgs: {},
                shim: {},
                config: {}
            },
            registry = {},
        //registry of just enabled modules, to speed
        //cycle breaking code when lots of modules
        //are registered, but not activated.
            enabledregistry = {},
            undefevents = {},
            defqueue = [],
            defined = {},
            urlfetched = {},
            bundlesmap = {},
            requirecounter = 1,
            unnormalizedcounter = 1;

        /**
         * trims the . and .. from an array of path segments.
         * it will keep a leading path segment if a .. will become
         * the first path segment, to help with module name lookups,
         * which act like paths, but can be remapped. but the end result,
         * all paths that use this function should look normalized.
         * note: this method modifies the input array.
         * @param {array} ary the array of path segments.
         */
        function trimdots(ary) {
            var i, part;
            for (i = 0; i < ary.length; i++) {
                part = ary[i];
                if (part === '.') {
                    ary.splice(i, 1);
                    i -= 1;
                } else if (part === '..') {
                    // if at the start, or previous value is still ..,
                    // keep them so that when converted to a path it may
                    // still work when converted to a path, even though
                    // as an id it is less than ideal. in larger point
                    // releases, may be better to just kick out an error.
                    if (i === 0 || (i == 1 && ary[2] === '..') || ary[i - 1] === '..') {
                        continue;
                    } else if (i > 0) {
                        ary.splice(i - 1, 2);
                        i -= 2;
                    }
                }
            }
        }

        /**
         * given a relative module name, like ./something, normalize it to
         * a real name that can be mapped to a path.
         * @param {string} name the relative name
         * @param {string} basename a real name that the name arg is relative
         * to.
         * @param {boolean} applymap apply the map config to the value. should
         * only be done if this normalization is for a dependency id.
         * @returns {string} normalized name
         */
        function normalize(name, basename, applymap) {
            var pkgmain, mapvalue, nameparts, i, j, namesegment, lastindex,
                foundmap, foundi, foundstarmap, stari, normalizedbaseparts,
                baseparts = (basename && basename.split('/')),
                map = config.map,
                starmap = map && map['*'];

            //adjust any relative paths.
            if (name) {
                name = name.split('/');
                lastindex = name.length - 1;

                // if wanting node id compatibility, strip .js from end
                // of ids. have to do this here, and not in nametourl
                // because node allows either .js or non .js to map
                // to same file.
                if (config.nodeidcompat && jssuffixregexp.test(name[lastindex])) {
                    name[lastindex] = name[lastindex].replace(jssuffixregexp, '');
                }

                // starts with a '.' so need the basename
                if (name[0].charat(0) === '.' && baseparts) {
                    //convert basename to array, and lop off the last part,
                    //so that . matches that 'directory' and not name of the basename's
                    //module. for instance, basename of 'one/two/three', maps to
                    //'one/two/three.js', but we want the directory, 'one/two' for
                    //this normalization.
                    normalizedbaseparts = baseparts.slice(0, baseparts.length - 1);
                    name = normalizedbaseparts.concat(name);
                }

                trimdots(name);
                name = name.join('/');
            }

            //apply map config if available.
            if (applymap && map && (baseparts || starmap)) {
                nameparts = name.split('/');

                outerloop: for (i = nameparts.length; i > 0; i -= 1) {
                    namesegment = nameparts.slice(0, i).join('/');

                    if (baseparts) {
                        //find the longest basename segment match in the config.
                        //so, do joins on the biggest to smallest lengths of baseparts.
                        for (j = baseparts.length; j > 0; j -= 1) {
                            mapvalue = getown(map, baseparts.slice(0, j).join('/'));

                            //basename segment has config, find if it has one for
                            //this name.
                            if (mapvalue) {
                                mapvalue = getown(mapvalue, namesegment);
                                if (mapvalue) {
                                    //match, update name to the new value.
                                    foundmap = mapvalue;
                                    foundi = i;
                                    break outerloop;
                                }
                            }
                        }
                    }

                    //check for a star map match, but just hold on to it,
                    //if there is a shorter segment match later in a matching
                    //config, then favor over this star map.
                    if (!foundstarmap && starmap && getown(starmap, namesegment)) {
                        foundstarmap = getown(starmap, namesegment);
                        stari = i;
                    }
                }

                if (!foundmap && foundstarmap) {
                    foundmap = foundstarmap;
                    foundi = stari;
                }

                if (foundmap) {
                    nameparts.splice(0, foundi, foundmap);
                    name = nameparts.join('/');
                }
            }

            // if the name points to a package's name, use
            // the package main instead.
            pkgmain = getown(config.pkgs, name);

            return pkgmain ? pkgmain : name;
        }

        function removescript(name) {
            if (isbrowser) {
                each(scripts(), function (scriptnode) {
                    if (scriptnode.getattribute('data-requiremodule') === name &&
                        scriptnode.getattribute('data-requirecontext') === context.contextname) {
                        scriptnode.parentnode.removechild(scriptnode);
                        return true;
                    }
                });
            }
        }

        function haspathfallback(id) {
            var pathconfig = getown(config.paths, id);
            if (pathconfig && isarray(pathconfig) && pathconfig.length > 1) {
                //pop off the first array value, since it failed, and
                //retry
                pathconfig.shift();
                context.require.undef(id);

                //custom require that does not do map translation, since
                //id is "absolute", already mapped/resolved.
                context.makerequire(null, {
                    skipmap: true
                })([id]);

                return true;
            }
        }

        //turns a plugin!resource to [plugin, resource]
        //with the plugin being undefined if the name
        //did not have a plugin prefix.
        function splitprefix(name) {
            var prefix,
                index = name ? name.indexof('!') : -1;
            if (index > -1) {
                prefix = name.substring(0, index);
                name = name.substring(index + 1, name.length);
            }
            return [prefix, name];
        }

        /**
         * creates a module mapping that includes plugin prefix, module
         * name, and path. if parentmodulemap is provided it will
         * also normalize the name via require.normalize()
         *
         * @param {string} name the module name
         * @param {string} [parentmodulemap] parent module map
         * for the module name, used to resolve relative names.
         * @param {boolean} isnormalized: is the id already normalized.
         * this is true if this call is done for a define() module id.
         * @param {boolean} applymap: apply the map config to the id.
         * should only be true if this map is for a dependency.
         *
         * @returns {object}
         */
        function makemodulemap(name, parentmodulemap, isnormalized, applymap) {
            var url, pluginmodule, suffix, nameparts,
                prefix = null,
                parentname = parentmodulemap ? parentmodulemap.name : null,
                originalname = name,
                isdefine = true,
                normalizedname = '';

            //if no name, then it means it is a require call, generate an
            //internal name.
            if (!name) {
                isdefine = false;
                name = '_@r' + (requirecounter += 1);
            }

            nameparts = splitprefix(name);
            prefix = nameparts[0];
            name = nameparts[1];

            if (prefix) {
                prefix = normalize(prefix, parentname, applymap);
                pluginmodule = getown(defined, prefix);
            }

            //account for relative paths if there is a base name.
            if (name) {
                if (prefix) {
                    if (pluginmodule && pluginmodule.normalize) {
                        //plugin is loaded, use its normalize method.
                        normalizedname = pluginmodule.normalize(name, function (name) {
                            return normalize(name, parentname, applymap);
                        });
                    } else {
                        // if nested plugin references, then do not try to
                        // normalize, as it will not normalize correctly. this
                        // places a restriction on resourceids, and the longer
                        // term solution is not to normalize until plugins are
                        // loaded and all normalizations to allow for async
                        // loading of a loader plugin. but for now, fixes the
                        // common uses. details in #1131
                        normalizedname = name.indexof('!') === -1 ?
                            normalize(name, parentname, applymap) :
                            name;
                    }
                } else {
                    //a regular module.
                    normalizedname = normalize(name, parentname, applymap);

                    //normalized name may be a plugin id due to map config
                    //application in normalize. the map config values must
                    //already be normalized, so do not need to redo that part.
                    nameparts = splitprefix(normalizedname);
                    prefix = nameparts[0];
                    normalizedname = nameparts[1];
                    isnormalized = true;

                    url = context.nametourl(normalizedname);
                }
            }

            //if the id is a plugin id that cannot be determined if it needs
            //normalization, stamp it with a unique id so two matching relative
            //ids that may conflict can be separate.
            suffix = prefix && !pluginmodule && !isnormalized ?
            '_unnormalized' + (unnormalizedcounter += 1) :
                '';

            return {
                prefix: prefix,
                name: normalizedname,
                parentmap: parentmodulemap,
                unnormalized: !!suffix,
                url: url,
                originalname: originalname,
                isdefine: isdefine,
                id: (prefix ?
                prefix + '!' + normalizedname :
                    normalizedname) + suffix
            };
        }

        function getmodule(depmap) {
            var id = depmap.id,
                mod = getown(registry, id);

            if (!mod) {
                mod = registry[id] = new context.module(depmap);
            }

            return mod;
        }

        function on(depmap, name, fn) {
            var id = depmap.id,
                mod = getown(registry, id);

            if (hasprop(defined, id) &&
                (!mod || mod.defineemitcomplete)) {
                if (name === 'defined') {
                    fn(defined[id]);
                }
            } else {
                mod = getmodule(depmap);
                if (mod.error && name === 'error') {
                    fn(mod.error);
                } else {
                    mod.on(name, fn);
                }
            }
        }

        function onerror(err, errback) {
            var ids = err.requiremodules,
                notified = false;

            if (errback) {
                errback(err);
            } else {
                each(ids, function (id) {
                    var mod = getown(registry, id);
                    if (mod) {
                        //set error on module, so it skips timeout checks.
                        mod.error = err;
                        if (mod.events.error) {
                            notified = true;
                            mod.emit('error', err);
                        }
                    }
                });

                if (!notified) {
                    req.onerror(err);
                }
            }
        }

        /**
         * internal method to transfer globalqueue items to this context's
         * defqueue.
         */
        function takeglobalqueue() {
            //push all the globaldefqueue items into the context's defqueue
            if (globaldefqueue.length) {
                //array splice in the values since the context code has a
                //local var ref to defqueue, so cannot just reassign the one
                //on context.
                apsp.apply(defqueue,
                    [defqueue.length, 0].concat(globaldefqueue));
                globaldefqueue = [];
            }
        }

        handlers = {
            'require': function (mod) {
                if (mod.require) {
                    return mod.require;
                } else {
                    return (mod.require = context.makerequire(mod.map));
                }
            },
            'exports': function (mod) {
                mod.usingexports = true;
                if (mod.map.isdefine) {
                    if (mod.exports) {
                        return (defined[mod.map.id] = mod.exports);
                    } else {
                        return (mod.exports = defined[mod.map.id] = {});
                    }
                }
            },
            'module': function (mod) {
                if (mod.module) {
                    return mod.module;
                } else {
                    return (mod.module = {
                        id: mod.map.id,
                        uri: mod.map.url,
                        config: function () {
                            return getown(config.config, mod.map.id) || {};
                        },
                        exports: mod.exports || (mod.exports = {})
                    });
                }
            }
        };

        function cleanregistry(id) {
            //clean up machinery used for waiting modules.
            delete registry[id];
            delete enabledregistry[id];
        }

        function breakcycle(mod, traced, processed) {
            var id = mod.map.id;

            if (mod.error) {
                mod.emit('error', mod.error);
            } else {
                traced[id] = true;
                each(mod.depmaps, function (depmap, i) {
                    var depid = depmap.id,
                        dep = getown(registry, depid);

                    //only force things that have not completed
                    //being defined, so still in the registry,
                    //and only if it has not been matched up
                    //in the module already.
                    if (dep && !mod.depmatched[i] && !processed[depid]) {
                        if (getown(traced, depid)) {
                            mod.definedep(i, defined[depid]);
                            mod.check(); //pass false?
                        } else {
                            breakcycle(dep, traced, processed);
                        }
                    }
                });
                processed[id] = true;
            }
        }

        function checkloaded() {
            var err, usingpathfallback,
                waitinterval = config.waitseconds * 1000,
            //it is possible to disable the wait interval by using waitseconds of 0.
                expired = waitinterval && (context.starttime + waitinterval) < new date().gettime(),
                noloads = [],
                reqcalls = [],
                stillloading = false,
                needcyclecheck = true;

            //do not bother if this call was a result of a cycle break.
            if (incheckloaded) {
                return;
            }

            incheckloaded = true;

            //figure out the state of all the modules.
            eachprop(enabledregistry, function (mod) {
                var map = mod.map,
                    modid = map.id;

                //skip things that are not enabled or in error state.
                if (!mod.enabled) {
                    return;
                }

                if (!map.isdefine) {
                    reqcalls.push(mod);
                }

                if (!mod.error) {
                    //if the module should be executed, and it has not
                    //been inited and time is up, remember it.
                    if (!mod.inited && expired) {
                        if (haspathfallback(modid)) {
                            usingpathfallback = true;
                            stillloading = true;
                        } else {
                            noloads.push(modid);
                            removescript(modid);
                        }
                    } else if (!mod.inited && mod.fetched && map.isdefine) {
                        stillloading = true;
                        if (!map.prefix) {
                            //no reason to keep looking for unfinished
                            //loading. if the only stillloading is a
                            //plugin resource though, keep going,
                            //because it may be that a plugin resource
                            //is waiting on a non-plugin cycle.
                            return (needcyclecheck = false);
                        }
                    }
                }
            });

            if (expired && noloads.length) {
                //if wait time expired, throw error of unloaded modules.
                err = makeerror('timeout', 'load timeout for modules: ' + noloads, null, noloads);
                err.contextname = context.contextname;
                return onerror(err);
            }

            //not expired, check for a cycle.
            if (needcyclecheck) {
                each(reqcalls, function (mod) {
                    breakcycle(mod, {}, {});
                });
            }

            //if still waiting on loads, and the waiting load is something
            //other than a plugin resource, or there are still outstanding
            //scripts, then just try back later.
            if ((!expired || usingpathfallback) && stillloading) {
                //something is still waiting to load. wait for it, but only
                //if a timeout is not already in effect.
                if ((isbrowser || iswebworker) && !checkloadedtimeoutid) {
                    checkloadedtimeoutid = settimeout(function () {
                        checkloadedtimeoutid = 0;
                        checkloaded();
                    }, 50);
                }
            }

            incheckloaded = false;
        }

        module = function (map) {
            this.events = getown(undefevents, map.id) || {};
            this.map = map;
            this.shim = getown(config.shim, map.id);
            this.depexports = [];
            this.depmaps = [];
            this.depmatched = [];
            this.pluginmaps = {};
            this.depcount = 0;

            /* this.exports this.factory
             this.depmaps = [],
             this.enabled, this.fetched
             */
        };

        module.prototype = {
            init: function (depmaps, factory, errback, options) {
                options = options || {};

                //do not do more inits if already done. can happen if there
                //are multiple define calls for the same module. that is not
                //a normal, common case, but it is also not unexpected.
                if (this.inited) {
                    return;
                }

                this.factory = factory;

                if (errback) {
                    //register for errors on this module.
                    this.on('error', errback);
                } else if (this.events.error) {
                    //if no errback already, but there are error listeners
                    //on this module, set up an errback to pass to the deps.
                    errback = bind(this, function (err) {
                        this.emit('error', err);
                    });
                }

                //do a copy of the dependency array, so that
                //source inputs are not modified. for example
                //"shim" deps are passed in here directly, and
                //doing a direct modification of the depmaps array
                //would affect that config.
                this.depmaps = depmaps && depmaps.slice(0);

                this.errback = errback;

                //indicate this module has be initialized
                this.inited = true;

                this.ignore = options.ignore;

                //could have option to init this module in enabled mode,
                //or could have been previously marked as enabled. however,
                //the dependencies are not known until init is called. so
                //if enabled previously, now trigger dependencies as enabled.
                if (options.enabled || this.enabled) {
                    //enable this module and dependencies.
                    //will call this.check()
                    this.enable();
                } else {
                    this.check();
                }
            },

            definedep: function (i, depexports) {
                //because of cycles, defined callback for a given
                //export can be called more than once.
                if (!this.depmatched[i]) {
                    this.depmatched[i] = true;
                    this.depcount -= 1;
                    this.depexports[i] = depexports;
                }
            },

            fetch: function () {
                if (this.fetched) {
                    return;
                }
                this.fetched = true;

                context.starttime = (new date()).gettime();

                var map = this.map;

                //if the manager is for a plugin managed resource,
                //ask the plugin to load it now.
                if (this.shim) {
                    context.makerequire(this.map, {
                        enablebuildcallback: true
                    })(this.shim.deps || [], bind(this, function () {
                        return map.prefix ? this.callplugin() : this.load();
                    }));
                } else {
                    //regular dependency.
                    return map.prefix ? this.callplugin() : this.load();
                }
            },

            load: function () {
                var url = this.map.url;

                //regular dependency.
                if (!urlfetched[url]) {
                    urlfetched[url] = true;
                    context.load(this.map.id, url);
                }
            },

            /**
             * checks if the module is ready to define itself, and if so,
             * define it.
             */
            check: function () {
                if (!this.enabled || this.enabling) {
                    return;
                }

                var err, cjsmodule,
                    id = this.map.id,
                    depexports = this.depexports,
                    exports = this.exports,
                    factory = this.factory;

                if (!this.inited) {
                    this.fetch();
                } else if (this.error) {
                    this.emit('error', this.error);
                } else if (!this.defining) {
                    //the factory could trigger another require call
                    //that would result in checking this module to
                    //define itself again. if already in the process
                    //of doing that, skip this work.
                    this.defining = true;

                    if (this.depcount < 1 && !this.defined) {
                        if (isfunction(factory)) {
                            //if there is an error listener, favor passing
                            //to that instead of throwing an error. however,
                            //only do it for define()'d  modules. require
                            //errbacks should not be called for failures in
                            //their callbacks (#699). however if a global
                            //onerror is set, use that.
                            if ((this.events.error && this.map.isdefine) ||
                                req.onerror !== defaultonerror) {
                                try {
                                    exports = context.execcb(id, factory, depexports, exports);
                                } catch (e) {
                                    err = e;
                                }
                            } else {
                                exports = context.execcb(id, factory, depexports, exports);
                            }

                            // favor return value over exports. if node/cjs in play,
                            // then will not have a return value anyway. favor
                            // module.exports assignment over exports object.
                            if (this.map.isdefine && exports === undefined) {
                                cjsmodule = this.module;
                                if (cjsmodule) {
                                    exports = cjsmodule.exports;
                                } else if (this.usingexports) {
                                    //exports already set the defined value.
                                    exports = this.exports;
                                }
                            }

                            if (err) {
                                err.requiremap = this.map;
                                err.requiremodules = this.map.isdefine ? [this.map.id] : null;
                                err.requiretype = this.map.isdefine ? 'define' : 'require';
                                return onerror((this.error = err));
                            }

                        } else {
                            //just a literal value
                            exports = factory;
                        }

                        this.exports = exports;

                        if (this.map.isdefine && !this.ignore) {
                            defined[id] = exports;

                            if (req.onresourceload) {
                                req.onresourceload(context, this.map, this.depmaps);
                            }
                        }

                        //clean up
                        cleanregistry(id);

                        this.defined = true;
                    }

                    //finished the define stage. allow calling check again
                    //to allow define notifications below in the case of a
                    //cycle.
                    this.defining = false;

                    if (this.defined && !this.defineemitted) {
                        this.defineemitted = true;
                        this.emit('defined', this.exports);
                        this.defineemitcomplete = true;
                    }

                }
            },

            callplugin: function () {
                var map = this.map,
                    id = map.id,
                //map already normalized the prefix.
                    pluginmap = makemodulemap(map.prefix);

                //mark this as a dependency for this plugin, so it
                //can be traced for cycles.
                this.depmaps.push(pluginmap);

                on(pluginmap, 'defined', bind(this, function (plugin) {
                    var load, normalizedmap, normalizedmod,
                        bundleid = getown(bundlesmap, this.map.id),
                        name = this.map.name,
                        parentname = this.map.parentmap ? this.map.parentmap.name : null,
                        localrequire = context.makerequire(map.parentmap, {
                            enablebuildcallback: true
                        });

                    //if current map is not normalized, wait for that
                    //normalized name to load instead of continuing.
                    if (this.map.unnormalized) {
                        //normalize the id if the plugin allows it.
                        if (plugin.normalize) {
                            name = plugin.normalize(name, function (name) {
                                return normalize(name, parentname, true);
                            }) || '';
                        }

                        //prefix and name should already be normalized, no need
                        //for applying map config again either.
                        normalizedmap = makemodulemap(map.prefix + '!' + name,
                            this.map.parentmap);
                        on(normalizedmap,
                            'defined', bind(this, function (value) {
                                this.init([], function () {
                                    return value;
                                }, null, {
                                    enabled: true,
                                    ignore: true
                                });
                            }));

                        normalizedmod = getown(registry, normalizedmap.id);
                        if (normalizedmod) {
                            //mark this as a dependency for this plugin, so it
                            //can be traced for cycles.
                            this.depmaps.push(normalizedmap);

                            if (this.events.error) {
                                normalizedmod.on('error', bind(this, function (err) {
                                    this.emit('error', err);
                                }));
                            }
                            normalizedmod.enable();
                        }

                        return;
                    }

                    //if a paths config, then just load that file instead to
                    //resolve the plugin, as it is built into that paths layer.
                    if (bundleid) {
                        this.map.url = context.nametourl(bundleid);
                        this.load();
                        return;
                    }

                    load = bind(this, function (value) {
                        this.init([], function () {
                            return value;
                        }, null, {
                            enabled: true
                        });
                    });

                    load.error = bind(this, function (err) {
                        this.inited = true;
                        this.error = err;
                        err.requiremodules = [id];

                        //remove temp unnormalized modules for this module,
                        //since they will never be resolved otherwise now.
                        eachprop(registry, function (mod) {
                            if (mod.map.id.indexof(id + '_unnormalized') === 0) {
                                cleanregistry(mod.map.id);
                            }
                        });

                        onerror(err);
                    });

                    //allow plugins to load other code without having to know the
                    //context or how to 'complete' the load.
                    load.fromtext = bind(this, function (text, textalt) {
                        /*jslint evil: true */
                        var modulename = map.name,
                            modulemap = makemodulemap(modulename),
                            hasinteractive = useinteractive;

                        //as of 2.1.0, support just passing the text, to reinforce
                        //fromtext only being called once per resource. still
                        //support old style of passing modulename but discard
                        //that modulename in favor of the internal ref.
                        if (textalt) {
                            text = textalt;
                        }

                        //turn off interactive script matching for ie for any define
                        //calls in the text, then turn it back on at the end.
                        if (hasinteractive) {
                            useinteractive = false;
                        }

                        //prime the system by creating a module instance for
                        //it.
                        getmodule(modulemap);

                        //transfer any config to this other module.
                        if (hasprop(config.config, id)) {
                            config.config[modulename] = config.config[id];
                        }

                        try {
                            req.exec(text);
                        } catch (e) {
                            return onerror(makeerror('fromtexteval',
                                'fromtext eval for ' + id +
                                ' failed: ' + e,
                                e,
                                [id]));
                        }

                        if (hasinteractive) {
                            useinteractive = true;
                        }

                        //mark this as a dependency for the plugin
                        //resource
                        this.depmaps.push(modulemap);

                        //support anonymous modules.
                        context.completeload(modulename);

                        //bind the value of that module to the value for this
                        //resource id.
                        localrequire([modulename], load);
                    });

                    //use parentname here since the plugin's name is not reliable,
                    //could be some weird string with no path that actually wants to
                    //reference the parentname's path.
                    plugin.load(map.name, localrequire, load, config);
                }));

                context.enable(pluginmap, this);
                this.pluginmaps[pluginmap.id] = pluginmap;
            },

            enable: function () {
                enabledregistry[this.map.id] = this;
                this.enabled = true;

                //set flag mentioning that the module is enabling,
                //so that immediate calls to the defined callbacks
                //for dependencies do not trigger inadvertent load
                //with the depcount still being zero.
                this.enabling = true;

                //enable each dependency
                each(this.depmaps, bind(this, function (depmap, i) {
                    var id, mod, handler;

                    if (typeof depmap === 'string') {
                        //dependency needs to be converted to a depmap
                        //and wired up to this module.
                        depmap = makemodulemap(depmap,
                            (this.map.isdefine ? this.map : this.map.parentmap),
                            false,
                            !this.skipmap);
                        this.depmaps[i] = depmap;

                        handler = getown(handlers, depmap.id);

                        if (handler) {
                            this.depexports[i] = handler(this);
                            return;
                        }

                        this.depcount += 1;

                        on(depmap, 'defined', bind(this, function (depexports) {
                            this.definedep(i, depexports);
                            this.check();
                        }));

                        if (this.errback) {
                            on(depmap, 'error', bind(this, this.errback));
                        }
                    }

                    id = depmap.id;
                    mod = registry[id];

                    //skip special modules like 'require', 'exports', 'module'
                    //also, don't call enable if it is already enabled,
                    //important in circular dependency cases.
                    if (!hasprop(handlers, id) && mod && !mod.enabled) {
                        context.enable(depmap, this);
                    }
                }));

                //enable each plugin that is used in
                //a dependency
                eachprop(this.pluginmaps, bind(this, function (pluginmap) {
                    var mod = getown(registry, pluginmap.id);
                    if (mod && !mod.enabled) {
                        context.enable(pluginmap, this);
                    }
                }));

                this.enabling = false;

                this.check();
            },

            on: function (name, cb) {
                var cbs = this.events[name];
                if (!cbs) {
                    cbs = this.events[name] = [];
                }
                cbs.push(cb);
            },

            emit: function (name, evt) {
                each(this.events[name], function (cb) {
                    cb(evt);
                });
                if (name === 'error') {
                    //now that the error handler was triggered, remove
                    //the listeners, since this broken module instance
                    //can stay around for a while in the registry.
                    delete this.events[name];
                }
            }
        };

        function callgetmodule(args) {
            //skip modules already defined.
            if (!hasprop(defined, args[0])) {
                getmodule(makemodulemap(args[0], null, true)).init(args[1], args[2]);
            }
        }

        function removelistener(node, func, name, iename) {
            //favor detachevent because of ie9
            //issue, see attachevent/addeventlistener comment elsewhere
            //in this file.
            if (node.detachevent && !isopera) {
                //probably ie. if not it will throw an error, which will be
                //useful to know.
                if (iename) {
                    node.detachevent(iename, func);
                }
            } else {
                node.removeeventlistener(name, func, false);
            }
        }

        /**
         * given an event from a script node, get the requirejs info from it,
         * and then removes the event listeners on the node.
         * @param {event} evt
         * @returns {object}
         */
        function getscriptdata(evt) {
            //using currenttarget instead of target for firefox 2.0's sake. not
            //all old browsers will be supported, but this one was easy enough
            //to support and still makes sense.
            var node = evt.currenttarget || evt.srcelement;

            //remove the listeners once here.
            removelistener(node, context.onscriptload, 'load', 'onreadystatechange');
            removelistener(node, context.onscripterror, 'error');

            return {
                node: node,
                id: node && node.getattribute('data-requiremodule')
            };
        }

        function intakedefines() {
            var args;

            //any defined modules in the global queue, intake them now.
            takeglobalqueue();

            //make sure any remaining defqueue items get properly processed.
            while (defqueue.length) {
                args = defqueue.shift();
                if (args[0] === null) {
                    return onerror(makeerror('mismatch', 'mismatched anonymous define() module: ' + args[args.length - 1]));
                } else {
                    //args are id, deps, factory. should be normalized by the
                    //define() function.
                    callgetmodule(args);
                }
            }
        }

        context = {
            config: config,
            contextname: contextname,
            registry: registry,
            defined: defined,
            urlfetched: urlfetched,
            defqueue: defqueue,
            module: module,
            makemodulemap: makemodulemap,
            nexttick: req.nexttick,
            onerror: onerror,

            /**
             * set a configuration for the context.
             * @param {object} cfg config object to integrate.
             */
            configure: function (cfg) {
                //make sure the baseurl ends in a slash.
                if (cfg.baseurl) {
                    if (cfg.baseurl.charat(cfg.baseurl.length - 1) !== '/') {
                        cfg.baseurl += '/';
                    }
                }

                //save off the paths since they require special processing,
                //they are additive.
                var shim = config.shim,
                    objs = {
                        paths: true,
                        bundles: true,
                        config: true,
                        map: true
                    };

                eachprop(cfg, function (value, prop) {
                    if (objs[prop]) {
                        if (!config[prop]) {
                            config[prop] = {};
                        }
                        mixin(config[prop], value, true, true);
                    } else {
                        config[prop] = value;
                    }
                });

                //reverse map the bundles
                if (cfg.bundles) {
                    eachprop(cfg.bundles, function (value, prop) {
                        each(value, function (v) {
                            if (v !== prop) {
                                bundlesmap[v] = prop;
                            }
                        });
                    });
                }

                //merge shim
                if (cfg.shim) {
                    eachprop(cfg.shim, function (value, id) {
                        //normalize the structure
                        if (isarray(value)) {
                            value = {
                                deps: value
                            };
                        }
                        if ((value.exports || value.init) && !value.exportsfn) {
                            value.exportsfn = context.makeshimexports(value);
                        }
                        shim[id] = value;
                    });
                    config.shim = shim;
                }

                //adjust packages if necessary.
                if (cfg.packages) {
                    each(cfg.packages, function (pkgobj) {
                        var location, name;

                        pkgobj = typeof pkgobj === 'string' ? {name: pkgobj} : pkgobj;

                        name = pkgobj.name;
                        location = pkgobj.location;
                        if (location) {
                            config.paths[name] = pkgobj.location;
                        }

                        //save pointer to main module id for pkg name.
                        //remove leading dot in main, so main paths are normalized,
                        //and remove any trailing .js, since different package
                        //envs have different conventions: some use a module name,
                        //some use a file name.
                        config.pkgs[name] = pkgobj.name + '/' + (pkgobj.main || 'main')
                            .replace(currdirregexp, '')
                            .replace(jssuffixregexp, '');
                    });
                }

                //if there are any "waiting to execute" modules in the registry,
                //update the maps for them, since their info, like urls to load,
                //may have changed.
                eachprop(registry, function (mod, id) {
                    //if module already has init called, since it is too
                    //late to modify them, and ignore unnormalized ones
                    //since they are transient.
                    if (!mod.inited && !mod.map.unnormalized) {
                        mod.map = makemodulemap(id);
                    }
                });

                //if a deps array or a config callback is specified, then call
                //require with those args. this is useful when require is defined as a
                //config object before require.js is loaded.
                if (cfg.deps || cfg.callback) {
                    context.require(cfg.deps || [], cfg.callback);
                }
            },

            makeshimexports: function (value) {
                function fn() {
                    var ret;
                    if (value.init) {
                        ret = value.init.apply(global, arguments);
                    }
                    return ret || (value.exports && getglobal(value.exports));
                }

                return fn;
            },

            makerequire: function (relmap, options) {
                options = options || {};

                function localrequire(deps, callback, errback) {
                    var id, map, requiremod;

                    if (options.enablebuildcallback && callback && isfunction(callback)) {
                        callback.__requirejsbuild = true;
                    }

                    if (typeof deps === 'string') {
                        if (isfunction(callback)) {
                            //invalid call
                            return onerror(makeerror('requireargs', 'invalid require call'), errback);
                        }

                        //if require|exports|module are requested, get the
                        //value for them from the special handlers. caveat:
                        //this only works while module is being defined.
                        if (relmap && hasprop(handlers, deps)) {
                            return handlers[deps](registry[relmap.id]);
                        }

                        //synchronous access to one module. if require.get is
                        //available (as in the node adapter), prefer that.
                        if (req.get) {
                            return req.get(context, deps, relmap, localrequire);
                        }

                        //normalize module name, if it contains . or ..
                        map = makemodulemap(deps, relmap, false, true);
                        id = map.id;

                        if (!hasprop(defined, id)) {
                            return onerror(makeerror('notloaded', 'module name "' +
                            id +
                            '" has not been loaded yet for context: ' +
                            contextname +
                            (relmap ? '' : '. use require([])')));
                        }
                        return defined[id];
                    }

                    //grab defines waiting in the global queue.
                    intakedefines();

                    //mark all the dependencies as needing to be loaded.
                    context.nexttick(function () {
                        //some defines could have been added since the
                        //require call, collect them.
                        intakedefines();

                        requiremod = getmodule(makemodulemap(null, relmap));

                        //store if map config should be applied to this require
                        //call for dependencies.
                        requiremod.skipmap = options.skipmap;

                        requiremod.init(deps, callback, errback, {
                            enabled: true
                        });

                        checkloaded();
                    });

                    return localrequire;
                }

                mixin(localrequire, {
                    isbrowser: isbrowser,

                    /**
                     * converts a module name + .extension into an url path.
                     * *requires* the use of a module name. it does not support using
                     * plain urls like nametourl.
                     */
                    tourl: function (modulenameplusext) {
                        var ext,
                            index = modulenameplusext.lastindexof('.'),
                            segment = modulenameplusext.split('/')[0],
                            isrelative = segment === '.' || segment === '..';

                        //have a file extension alias, and it is not the
                        //dots from a relative path.
                        if (index !== -1 && (!isrelative || index > 1)) {
                            ext = modulenameplusext.substring(index, modulenameplusext.length);
                            modulenameplusext = modulenameplusext.substring(0, index);
                        }

                        return context.nametourl(normalize(modulenameplusext,
                            relmap && relmap.id, true), ext, true);
                    },

                    defined: function (id) {
                        return hasprop(defined, makemodulemap(id, relmap, false, true).id);
                    },

                    specified: function (id) {
                        id = makemodulemap(id, relmap, false, true).id;
                        return hasprop(defined, id) || hasprop(registry, id);
                    }
                });

                //only allow undef on top level require calls
                if (!relmap) {
                    localrequire.undef = function (id) {
                        //bind any waiting define() calls to this context,
                        //fix for #408
                        takeglobalqueue();

                        var map = makemodulemap(id, relmap, true),
                            mod = getown(registry, id);

                        removescript(id);

                        delete defined[id];
                        delete urlfetched[map.url];
                        delete undefevents[id];

                        //clean queued defines too. go backwards
                        //in array so that the splices do not
                        //mess up the iteration.
                        eachreverse(defqueue, function (args, i) {
                            if (args[0] === id) {
                                defqueue.splice(i, 1);
                            }
                        });

                        if (mod) {
                            //hold on to listeners in case the
                            //module will be attempted to be reloaded
                            //using a different config.
                            if (mod.events.defined) {
                                undefevents[id] = mod.events;
                            }

                            cleanregistry(id);
                        }
                    };
                }

                return localrequire;
            },

            /**
             * called to enable a module if it is still in the registry
             * awaiting enablement. a second arg, parent, the parent module,
             * is passed in for context, when this method is overridden by
             * the optimizer. not shown here to keep code compact.
             */
            enable: function (depmap) {
                var mod = getown(registry, depmap.id);
                if (mod) {
                    getmodule(depmap).enable();
                }
            },

            /**
             * internal method used by environment adapters to complete a load event.
             * a load event could be a script load or just a load pass from a synchronous
             * load call.
             * @param {string} modulename the name of the module to potentially complete.
             */
            completeload: function (modulename) {
                var found, args, mod,
                    shim = getown(config.shim, modulename) || {},
                    shexports = shim.exports;

                takeglobalqueue();

                while (defqueue.length) {
                    args = defqueue.shift();
                    if (args[0] === null) {
                        args[0] = modulename;
                        //if already found an anonymous module and bound it
                        //to this name, then this is some other anon module
                        //waiting for its completeload to fire.
                        if (found) {
                            break;
                        }
                        found = true;
                    } else if (args[0] === modulename) {
                        //found matching define call for this script!
                        found = true;
                    }

                    callgetmodule(args);
                }

                //do this after the cycle of callgetmodule in case the result
                //of those calls/init calls changes the registry.
                mod = getown(registry, modulename);

                if (!found && !hasprop(defined, modulename) && mod && !mod.inited) {
                    if (config.enforcedefine && (!shexports || !getglobal(shexports))) {
                        if (haspathfallback(modulename)) {
                            return;
                        } else {
                            return onerror(makeerror('nodefine',
                                'no define call for ' + modulename,
                                null,
                                [modulename]));
                        }
                    } else {
                        //a script that does not call define(), so just simulate
                        //the call for it.
                        callgetmodule([modulename, (shim.deps || []), shim.exportsfn]);
                    }
                }

                checkloaded();
            },

            /**
             * converts a module name to a file path. supports cases where
             * modulename may actually be just an url.
             * note that it **does not** call normalize on the modulename,
             * it is assumed to have already been normalized. this is an
             * internal api, not a public one. use tourl for the public api.
             */
            nametourl: function (modulename, ext, skipext) {
                var paths, syms, i, parentmodule, url,
                    parentpath, bundleid,
                    pkgmain = getown(config.pkgs, modulename);

                if (pkgmain) {
                    modulename = pkgmain;
                }

                bundleid = getown(bundlesmap, modulename);

                if (bundleid) {
                    return context.nametourl(bundleid, ext, skipext);
                }

                //if a colon is in the url, it indicates a protocol is used and it is just
                //an url to a file, or if it starts with a slash, contains a query arg (i.e. ?)
                //or ends with .js, then assume the user meant to use an url and not a module id.
                //the slash is important for protocol-less urls as well as full paths.
                if (req.jsextregexp.test(modulename)) {
                    //just a plain path, not module name lookup, so just return it.
                    //add extension if it is included. this is a bit wonky, only non-.js things pass
                    //an extension, this method probably needs to be reworked.
                    url = modulename + (ext || '');
                } else {
                    //a module that needs to be converted to a path.
                    paths = config.paths;

                    syms = modulename.split('/');
                    //for each module name segment, see if there is a path
                    //registered for it. start with most specific name
                    //and work up from it.
                    for (i = syms.length; i > 0; i -= 1) {
                        parentmodule = syms.slice(0, i).join('/');

                        parentpath = getown(paths, parentmodule);
                        if (parentpath) {
                            //if an array, it means there are a few choices,
                            //choose the one that is desired
                            if (isarray(parentpath)) {
                                parentpath = parentpath[0];
                            }
                            syms.splice(0, i, parentpath);
                            break;
                        }
                    }

                    //join the path parts together, then figure out if baseurl is needed.
                    url = syms.join('/');
                    url += (ext || (/^data\:|\?/.test(url) || skipext ? '' : '.js'));
                    url = (url.charat(0) === '/' || url.match(/^[\w\+\.\-]+:/) ? '' : config.baseurl) + url;
                }

                return url +
                    ((url.indexof('?') === -1 ? '?' : '&') +
                    'version=' + global.version);
            },

            //delegates to req.load. broken out as a separate function to
            //allow overriding in the optimizer.
            load: function (id, url) {
                req.load(context, id, url);
            },

            /**
             * executes a module callback function. broken out as a separate function
             * solely to allow the build system to sequence the files in the built
             * layer in the right sequence.
             *
             * @private
             */
            execcb: function (name, callback, args, exports) {
                return callback.apply(exports, args);
            },

            /**
             * callback for script loads, used to check status of loading.
             *
             * @param {event} evt the event from the browser for the script
             * that was loaded.
             */
            onscriptload: function (evt) {
                //using currenttarget instead of target for firefox 2.0's sake. not
                //all old browsers will be supported, but this one was easy enough
                //to support and still makes sense.
                if (evt.type === 'load' ||
                    (readyregexp.test((evt.currenttarget || evt.srcelement).readystate))) {
                    //reset interactive script so a script node is not held onto for
                    //to long.
                    interactivescript = null;

                    //pull out the name of the module and the context.
                    var data = getscriptdata(evt);
                    context.completeload(data.id);
                }
            },

            /**
             * callback for script errors.
             */
            onscripterror: function (evt) {
                var data = getscriptdata(evt);
                if (!haspathfallback(data.id)) {
                    return onerror(makeerror('scripterror', 'script error for: ' + data.id, evt, [data.id]));
                }
            }
        };

        context.require = context.makerequire();
        return context;
    }

    /**
     * main entry point.
     *
     * if the only argument to require is a string, then the module that
     * is represented by that string is fetched for the appropriate context.
     *
     * if the first argument is an array, then it will be treated as an array
     * of dependency string names to fetch. an optional function callback can
     * be specified to execute when all of those dependencies are available.
     *
     * make a local req variable to help caja compliance (it assumes things
     * on a require that are not standardized), and to give a short
     * name for minification/local scope use.
     */
    req = requirejs = function (deps, callback, errback, optional) {

        //find the right context, use default
        var context, config,
            contextname = defcontextname;

        // determine if have config object in the call.
        if (!isarray(deps) && typeof deps !== 'string') {
            // deps is a config object
            config = deps;
            if (isarray(callback)) {
                // adjust args if there are dependencies
                deps = callback;
                callback = errback;
                errback = optional;
            } else {
                deps = [];
            }
        }

        if (config && config.context) {
            contextname = config.context;
        }

        context = getown(contexts, contextname);
        if (!context) {
            context = contexts[contextname] = req.s.newcontext(contextname);
        }

        if (config) {
            context.configure(config);
        }

        return context.require(deps, callback, errback);
    };

    /**
     * support require.config() to make it easier to cooperate with other
     * amd loaders on globally agreed names.
     */
    req.config = function (config) {
        return req(config);
    };

    /**
     * execute something after the current tick
     * of the event loop. override for other envs
     * that have a better solution than settimeout.
     * @param  {function} fn function to execute later.
     */
    req.nexttick = typeof settimeout !== 'undefined' ? function (fn) {
        settimeout(fn, 4);
    } : function (fn) {
        fn();
    };

    /**
     * export require as a global, but only if it does not already exist.
     */
    if (!require) {
        require = req;
    }

    req.version = version;

    //used to filter out dependencies that are already paths.
    req.jsextregexp = /^\/|:|\?|\.js$/;
    req.isbrowser = isbrowser;
    s = req.s = {
        contexts: contexts,
        newcontext: newcontext
    };

    //create default context.
    req({});

    //exports some context-sensitive methods on global require.
    each([
        'tourl',
        'undef',
        'defined',
        'specified'
    ], function (prop) {
        //reference from contexts instead of early binding to default context,
        //so that during builds, the latest instance of the default context
        //with its config gets used.
        req[prop] = function () {
            var ctx = contexts[defcontextname];
            return ctx.require[prop].apply(ctx, arguments);
        };
    });

    if (isbrowser) {
        head = s.head = document.getelementsbytagname('head')[0];
        //if base tag is in play, using appendchild is a problem for ie6.
        //when that browser dies, this can be removed. details in this jquery bug:
        //http://dev.jquery.com/ticket/2709
        baseelement = document.getelementsbytagname('base')[0];
        if (baseelement) {
            head = s.head = baseelement.parentnode;
        }
    }

    /**
     * any errors that require explicitly generates will be passed to this
     * function. intercept/override it if you want custom error handling.
     * @param {error} err the error object.
     */
    req.onerror = defaultonerror;

    /**
     * creates the node for the load command. only used in browser envs.
     */
    req.createnode = function (config, modulename, url) {
        var node = config.xhtml ?
            document.createelementns('http://www.w3.org/1999/xhtml', 'html:script') :
            document.createelement('script');
        node.type = config.scripttype || 'text/javascript';
        node.charset = 'utf-8';
        node.async = true;
        return node;
    };

    /**
     * does the request to load a module for the browser case.
     * make this a separate function to allow other environments
     * to override it.
     *
     * @param {object} context the require context to find state.
     * @param {string} modulename the name of the module.
     * @param {object} url the url to the module.
     */
    req.load = function (context, modulename, url) {
        var config = (context && context.config) || {},
            node;
        if (isbrowser) {
            //in the browser so use a script tag
            node = req.createnode(config, modulename, url);

            node.setattribute('data-requirecontext', context.contextname);
            node.setattribute('data-requiremodule', modulename);

            //set up load listener. test attachevent first because ie9 has
            //a subtle issue in its addeventlistener and script onload firings
            //that do not match the behavior of all other browsers with
            //addeventlistener support, which fire the onload event for a
            //script right after the script execution. see:
            //https://connect.microsoft.com/ie/feedback/details/648057/script-onload-event-is-not-fired-immediately-after-script-execution
            //unfortunately opera implements attachevent but does not follow the script
            //script execution mode.
            if (node.attachevent &&
                    //check if node.attachevent is artificially added by custom script or
                    //natively supported by browser
                    //read https://github.com/jrburke/requirejs/issues/187
                    //if we can not find [native code] then it must not natively supported.
                    //in ie8, node.attachevent does not have tostring()
                    //note the test for "[native code" with no closing brace, see:
                    //https://github.com/jrburke/requirejs/issues/273
                !(node.attachevent.tostring && node.attachevent.tostring().indexof('[native code') < 0) && !isopera) {
                //probably ie. ie (at least 6-8) do not fire
                //script onload right after executing the script, so
                //we cannot tie the anonymous define call to a name.
                //however, ie reports the script as being in 'interactive'
                //readystate at the time of the define call.
                useinteractive = true;

                node.attachevent('onreadystatechange', context.onscriptload);
                //it would be great to add an error handler here to catch
                //404s in ie9+. however, onreadystatechange will fire before
                //the error handler, so that does not help. if addeventlistener
                //is used, then ie will fire error before load, but we cannot
                //use that pathway given the connect.microsoft.com issue
                //mentioned above about not doing the 'script execute,
                //then fire the script load event listener before execute
                //next script' that other browsers do.
                //best hope: ie10 fixes the issues,
                //and then destroys all installs of ie 6-9.
                //node.attachevent('onerror', context.onscripterror);
            } else {
                node.addeventlistener('load', context.onscriptload, false);
                node.addeventlistener('error', context.onscripterror, false);
            }
            node.src = url;

            //for some cache cases in ie 6-8, the script executes before the end
            //of the appendchild execution, so to tie an anonymous define
            //call to the module name (which is stored on the node), hold on
            //to a reference to this node, but clear after the dom insertion.
            currentlyaddingscript = node;
            if (baseelement) {
                head.insertbefore(node, baseelement);
            } else {
                head.appendchild(node);
            }
            currentlyaddingscript = null;

            return node;
        } else if (iswebworker) {
            try {
                //in a web worker, use importscripts. this is not a very
                //efficient use of importscripts, importscripts will block until
                //its script is downloaded and evaluated. however, if web workers
                //are in play, the expectation that a build has been done so that
                //only one script needs to be loaded anyway. this may need to be
                //reevaluated if other use cases become common.
                importscripts(url);

                //account for anonymous modules
                context.completeload(modulename);
            } catch (e) {
                context.onerror(makeerror('importscripts',
                    'importscripts failed for ' +
                    modulename + ' at ' + url,
                    e,
                    [modulename]));
            }
        }
    };

    function getinteractivescript() {
        if (interactivescript && interactivescript.readystate === 'interactive') {
            return interactivescript;
        }

        eachreverse(scripts(), function (script) {
            if (script.readystate === 'interactive') {
                return (interactivescript = script);
            }
        });
        return interactivescript;
    }

    //look for a data-main script attribute, which could also adjust the baseurl.
    if (isbrowser && !cfg.skipdatamain) {
        //figure out baseurl. get it from the script tag with require.js in it.
        eachreverse(scripts(), function (script) {
            //set the 'head' where we can append children by
            //using the script's parent.
            if (!head) {
                head = script.parentnode;
            }

            //look for a data-main attribute to set main script for the page
            //to load. if it is there, the path to data main becomes the
            //baseurl, if it is not already set.
            datamain = script.getattribute('data-main');
            if (datamain) {
                //preserve datamain in case it is a path (i.e. contains '?')
                mainscript = datamain;

                //set final baseurl if there is not already an explicit one.
                if (!cfg.baseurl) {
                    //pull off the directory of data-main for use as the
                    //baseurl.
                    src = mainscript.split('/');
                    mainscript = src.pop();
                    subpath = src.length ? src.join('/') + '/' : './';

                    cfg.baseurl = subpath;
                }

                //strip off any trailing .js since mainscript is now
                //like a module name.
                mainscript = mainscript.replace(jssuffixregexp, '');

                //if mainscript is still a path, fall back to datamain
                if (req.jsextregexp.test(mainscript)) {
                    mainscript = datamain;
                }

                //put the data-main script in the files to load.
                cfg.deps = cfg.deps ? cfg.deps.concat(mainscript) : [mainscript];

                return true;
            }
        });
    }

    /**
     * the function that handles definitions of modules. differs from
     * require() in that a string for the module should be the first argument,
     * and the function to execute after dependencies are loaded should
     * return a value to define the module corresponding to the first argument's
     * name.
     */
    define = function (name, deps, callback) {
        var node, context;

        //allow for anonymous modules
        if (typeof name !== 'string') {
            //adjust args appropriately
            callback = deps;
            deps = name;
            name = null;
        }

        //this module may not have dependencies
        if (!isarray(deps)) {
            callback = deps;
            deps = null;
        }

        //if no name, and callback is a function, then figure out if it a
        //commonjs thing with dependencies.
        if (!deps && isfunction(callback)) {
            deps = [];
            //remove comments from the callback string,
            //look for require calls, and pull them into the dependencies,
            //but only if there are function args.
            if (callback.length) {
                callback
                    .tostring()
                    .replace(commentregexp, '')
                    .replace(cjsrequireregexp, function (match, dep) {
                        deps.push(dep);
                    });

                //may be a commonjs thing even without require calls, but still
                //could use exports, and module. avoid doing exports and module
                //work though if it just needs require.
                //requires the function to expect the commonjs variables in the
                //order listed below.
                deps = (callback.length === 1 ? ['require'] : ['require', 'exports', 'module']).concat(deps);
            }
        }

        //if in ie 6-8 and hit an anonymous define() call, do the interactive
        //work.
        if (useinteractive) {
            node = currentlyaddingscript || getinteractivescript();
            if (node) {
                if (!name) {
                    name = node.getattribute('data-requiremodule');
                }
                context = contexts[node.getattribute('data-requirecontext')];
            }
        }

        //always save off evaluating the def call until the script onload handler.
        //this allows multiple modules to be in a file without prematurely
        //tracing dependencies, and allows for anonymous module support,
        //where the module name is not known until the script onload event
        //occurs. if no context, use the global queue, and get it processed
        //in the onscript load callback.
        (context ? context.defqueue : globaldefqueue).push([name, deps, callback]);
    };

    define.amd = {
        jquery: true
    };


    /**
     * executes the text. normally just uses eval, but can be modified
     * to use a better, environment-specific call. only used for transpiling
     * loader plugins, not for plain js modules.
     * @param {string} text the text to execute/evaluate.
     */
    req.exec = function (text) {
        /*jslint evil: true */
        return eval(text);
    };

    //set up with config info.
    req(cfg);
}(this));