Ext.data.ScriptTagProxy=function(a){Ext.data.ScriptTagProxy.superclass.constructor.call(this);Ext.apply(this,a);this.head=document.getElementsByTagName("head")[0]};Ext.data.ScriptTagProxy.TRANS_ID=1000;Ext.extend(Ext.data.ScriptTagProxy,Ext.data.DataProxy,{timeout:30000,callbackParam:"callback",nocache:true,load:function(e,f,h,i,j){if(this.fireEvent("beforeload",this,e)!==false){var c=Ext.urlEncode(Ext.apply(e,this.extraParams));var b=this.url;b+=(b.indexOf("?")!=-1?"&":"?")+c;if(this.nocache){b+="&_dc="+(new Date().getTime())}var a=++Ext.data.ScriptTagProxy.TRANS_ID;var k={id:a,cb:"stcCallback"+a,scriptId:"stcScript"+a,params:e,arg:j,url:b,callback:h,scope:i,reader:f};var d=this;window[k.cb]=function(l){d.handleResponse(l,k)};b+=String.format("&{0}={1}",this.callbackParam,k.cb);if(this.autoAbort!==false){this.abort()}k.timeoutId=this.handleFailure.defer(this.timeout,this,[k]);var g=document.createElement("script");g.setAttribute("src",b);g.setAttribute("type","text/javascript");g.setAttribute("id",k.scriptId);this.head.appendChild(g);this.trans=k}else{h.call(i||this,null,j,false)}},isLoading:function(){return this.trans?true:false},abort:function(){if(this.isLoading()){this.destroyTrans(this.trans)}},destroyTrans:function(b,a){this.head.removeChild(document.getElementById(b.scriptId));clearTimeout(b.timeoutId);if(a){window[b.cb]=undefined;try{delete window[b.cb]}catch(c){}}else{window[b.cb]=function(){window[b.cb]=undefined;try{delete window[b.cb]}catch(d){}}}},handleResponse:function(d,b){this.trans=false;this.destroyTrans(b,true);var a;try{a=b.reader.readRecords(d)}catch(c){this.fireEvent("loadexception",this,d,b.arg,c);b.callback.call(b.scope||window,null,b.arg,false);return}this.fireEvent("load",this,d,b.arg);b.callback.call(b.scope||window,a,b.arg,true)},handleFailure:function(a){this.trans=false;this.destroyTrans(a,false);this.fireEvent("loadexception",this,null,a.arg);a.callback.call(a.scope||window,null,a.arg,false)}});