var net=new Object();
net.READY_STATE_UNINITIALIZED=0;
net.READY_STATE_LOADING=1;
net.READY_STATE_LOADED=2;
net.READY_STATE_INTERACTIVE=3;
net.READY_STATE_COMPLETE=4;
/*--- content loader object for cross-browser requests ---*/
net.ContentLoader = function(url,on_load,on_error,method,params,contentType){
						this.req=null;
						this.on_load=on_load;
						this.on_error=(on_error) ? on_error : this.defaultError;
						this.loadXMLDoc(url,method,params,contentType);
					}
net.ContentLoader.prototype.loadXMLDoc=function(url,method,params,contentType){
											if (!method){method="GET";
										}
if (!contentType && method=="POST"){
	contentType='application/x-www-form-urlencoded';
}
if (window.XMLHttpRequest){
	this.req=new XMLHttpRequest();
}else if (window.ActiveXObject){
	//add try catch;
	try {
		this.req = new ActiveXObject("Msxml2.XMLHTTP");
	}catch (e1){
		try {
			this.req = new ActiveXObject("Microsoft.XMLHTTP");     
		} catch (e2){}
	}
	////this.req=new ActiveXObject("Microsoft.XMLHTTP");
}
if (this.req){
	try{
		var loader=this;
		this.req.onreadystatechange=function(){
										net.ContentLoader.onReadyState.call(loader);
									}
this.req.open(method,url,true);
if (contentType){
	this.req.setRequestHeader('Content-Type', contentType);
}
this.req.send(params);
}catch (err){
	this.on_error.call(this);
}
}
}
net.ContentLoader.onReadyState=function(){
	var req=this.req;
	var ready=req.readyState;
	if (ready==net.READY_STATE_COMPLETE){
		var httpStatus=req.status;
		if (httpStatus==200 || httpStatus==0){
			this.on_load.call(this);
		}else{
			this.on_error.call(this);
		}
	}
}
net.ContentLoader.prototype.defaultError=function(){
	alert("error fetching data!"+"\n\nreadyState:"+this.req.readyState+"\nstatus: "+this.req.status+"\nheaders: "+this.req.getAllResponseHeaders());
}