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;
net.ContentLoader = function(component,url,method,requestParams){
	this.component = component;
	this.url = url;
	this.requestParams = requestParams;
	this.method = method;
}

net.ContentLoader.prototype={
	
	getTransport: function(){
		var transport;
		if(window.XMLHttpRequest)
			transport = new XMLHttpRequest();
		else if(window.ActiveXObject){
			try{transport=new ActiveXObject('Msxml.XMLHTTP');}
			catch(err){
				transport = new ActiveXObject('Microsoft.XMLHTTP');
			}
		}
		return transport;
	},
	
	sendRequest: function(){
		var requestParams = [];
		for(var i=0;i<arguments.length;i++){
			requestParams.push(arguments[i]);
		}
		var request = this.getTransport();
		request.open(this.method,this.url,true);
		request.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
		var oThis = this;
		request.onreadystatechange = function(){
			oThis.handleAjaxResponse(request);
		}
		request.send(this.queryString(requestParams));
	},
	
	queryString: function(args){
		var requestParams = [];
		for(var i=0;i<this.requestParams.length;i++){
			requestParams.push(this.requestParams[i]);
		}
		for(var j=0;j<args.length;j++){
			requestParams.push(args[j]);
		}
		var queryString = "";
		if(requestParams && requestParams.length > 0){
			for(var i=0;i<requestParams.length;i++){
				queryString+=requestParams[i]+'&';
			}
			queryString=queryString.substring(0,queryString.length-1);
		}
		return queryString;
	},
	
	handleAjaxResponse: function(request){
		if(request.readyState==net.READY_STATE_COMPLETE){
			if(this.isSuccess(request)){
				this.component.ajaxUpdate(request);
			}else{}
		}
	},
	
	isSuccess: function(request){
		return request.status == 0 || (request.status >= 200 && request.status < 300);
	}
}