var isIE = false;
var req;
var DIV;
//function crea_query_string(valor) {
//  return "id_categoria=" + encodeURIComponent(valor) +
//         "&nocache=" + Math.random();
function cargaXML(url,obj) 
{
	DIV=obj;
	DIV.style.display="";
	if (window.XMLHttpRequest)
	{
		req = new XMLHttpRequest();
		req.onreadystatechange = processReqChange;
			req.open("GET", url, true);
			  req.send(null);
//			 req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  //  		 var query_string = crea_query_string(id_categoria);
			 //alert(query_string);
//		     req.send(query_string);
	} 
	else if (window.ActiveXObject) 
	{
		isIE = true;
		req = new ActiveXObject("Microsoft.XMLHTTP");
		if (req) 
		{
			req.onreadystatechange = processReqChange;
			req.open("GET", url, true);
			req.send(null);
		}
	}
}
//*************************************************************************
function processReqChange(){
	if(req.readyState == 4){
		if(DIV.title!="carro")
		DIV.innerHTML = req.responseText;
		else
		{
		DIV.innerHTML = '<img src="loading.gif"/>';
		setTimeout(loading,1500);
		}
	} 
	else {
		DIV.innerHTML = '<img src="loading.gif"/>';
	}
}


function loading()
{DIV.innerHTML = req.responseText;}