Ext 2.0动态加载JS工具类（经典）

solarmoon

转自：http://www.ajaxbbs.net/post/extjs/ExtJs-dynamic-LoadJS-Class.htmlScriptLoader = function() {        this.timeout = 30;        this.scripts = [];        this.disableCaching = false;        this.loadMask = null;        };           ScriptLoader.prototype = {          showMask: function() {          if (!this.loadMask) {            this.loadMask = new Ext.LoadMask(Ext.getBody());            this.loadMask.show();            }          },             hideMask: function() {          if (this.loadMask) {            this.loadMask.hide();            this.loadMask = null;            }          },             processSuccess: function(response) {          this.scripts[response.argument.url] = true;          window.execScript ? window.execScript(response.responseText) : window.eval(response.responseText);          if (response.argument.options.scripts.length == 0) {            this.hideMask();            }          if (typeof response.argument.callback == 'function') {              response.argument.callback.call(response.argument.scope);            }          },             processFailure: function(response) {          this.hideMask();            Ext.MessageBox.show({title: 'Application Error', msg: 'Script library could not be loaded.', closable: false, icon: Ext.MessageBox.ERROR, minWidth: 200});          setTimeout(function() { Ext.MessageBox.hide(); }, 3000);          },           load: function(url, callback) {          var cfg, callerScope;          if (typeof url == 'object') { // must be config object                cfg = url;                url = cfg.url;                callback = callback || cfg.callback;                callerScope = cfg.scope;              if (typeof cfg.timeout != 'undefined') {                this.timeout = cfg.timeout;                }              if (typeof cfg.disableCaching != 'undefined') {                this.disableCaching = cfg.disableCaching;                }            }             if (this.scripts[url]) {            if (typeof callback == 'function') {                callback.call(callerScope || window);              }            return null;            }             this.showMask();               Ext.Ajax.request({                url: url,                success: this.processSuccess,                failure: this.processFailure,                scope: this,                timeout: (this.timeout*1000),                disableCaching: this.disableCaching,                argument: {                'url': url,                'scope': callerScope || window,                'callback': callback,                'options': cfg                }            });          }        };           ScriptLoaderMgr = function() {        this.loader = new ScriptLoader();           this.load = function(o) {          if (!Ext.isArray(o.scripts)) {              o.scripts = [o.scripts];            }               o.url = o.scripts.shift();             if (o.scripts.length == 0) {            this.loader.load(o);            } else {              o.scope = this;            this.loader.load(o, function() {              this.load(o);              });            }          };        };           ScriptMgr = new ScriptLoaderMgr();  构建一个one page one application的应用，动态的加载js组件是关键，虽然看到了5，6种解决方案，可是还是没办法做的很通用，作为一个项目组件。突然发现ExtJs的官方论坛确实是个好地方，由很多好用的资源，可是E文还是没有母语看这舒服，把最好的方案记录下。原文地址：http://extjs.com/forum/showthread.php?t=37897
使用示例:
ScriptMgr.load({        scripts: ['/js/other-prerequisite.js', '/js/other.js'],        callback: function() {        var other = new OtherObject();          alert(other); //just loaded        }    });