Ext.override(Ext.data.ScriptTagProxy,{load:function(params,reader,callback,scope,arg){if(this.fireEvent("beforeload",this,params)!==false){var p=(typeof params=="string")?params:Ext.urlEncode(params);if(this.extraParams){p+=((p.length==0)?"":"&")+((typeof this.extraParams=="string")?this.extraParams:Ext.urlEncode(params));}
var url=this.url;url+=(url.indexOf("?")!=-1?"&":"?")+p;if(this.nocache){url+="&_dc="+(new Date().getTime());}
var transId=++Ext.data.ScriptTagProxy.TRANS_ID;var trans={id:transId,cb:"stcCallback"+transId,scriptId:"stcScript"+transId,params:params,arg:arg,url:url,callback:callback,scope:scope,reader:reader};var conn=this;window[trans.cb]=function(o){conn.handleResponse(o,trans);};url+=String.format("&{0}={1}",this.callbackParam,trans.cb);if(this.autoAbort!==false){this.abort();}
trans.timeoutId=this.handleFailure.defer(this.timeout,this,[trans]);var script=document.createElement("script");script.setAttribute("src",url);script.setAttribute("type","text/javascript");script.setAttribute("id",trans.scriptId);this.head.appendChild(script);this.trans=trans;}else{callback.call(scope||this,null,arg,false);}}})