httpRequest=function(url,params,method,callback,async){this.id="id"+Math.round(Math.random()*10000000000);httpRequest.instance=new Array();httpRequest.instance[this.id]=this;this.async=async;this.params=params;this.getHTTPObject();this.url=url;this.method=method.toUpperCase();this.callback=callback;this.send();};httpRequest.prototype={init:function(){if(this.method!='POST'||this.method!='GET')this.method='POST'},getHTTPObject:function(){this.xmlhttp=false;if(window.ActiveXObject){try{req=new ActiveXObject("Msxml2.XMLHTTP")}catch(e){req=new ActiveXObject("Microsoft.XMLHTTP")}}if(!this.xmlhttp&&typeof XMLHttpRequest!='undefined'){try{this.xmlhttp=new XMLHttpRequest()}catch(e){this.xmlhttp=false}}},setParams:function(){if(this.params==null||this.params==undefined)return null;var aParams=new Array();for(a in this.params){aParams.push(a+"="+this.params[a])}var szParams=aParams.join('&');return szParams},setEvents:function(){var id=this.id;if(this.xmlhttp){this.xmlhttp.onreadystatechange=function(){if(this.readyState==4){if(this.status&&this.status==200){httpRequest.instance[id].callback(this.responseText)}}}}},send:function(){var opener='';var sender=null;switch(this.method){case'POST':opener=this.url;sender=this.setParams();break;case'GET':var p=this.setParams();(p==null)?p='':p="?"+p;opener=this.url+p;break;default:break}if(this.async)this.setEvents();this.xmlhttp.open(this.method,opener,this.async);this.xmlhttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');if(this.xmlhttp.overrideMimeType)this.xmlhttp.overrideMimeType('text/xml; charset=UTF-8');this.xmlhttp.send(sender);if(!this.async)this.callback(this.xmlhttp.responseText)}}