var isIE = false;
var req;
var destino = "";
function cargaXML(url,donde) {
	
	 if(url==''){
        return;
    }
	destino = donde;
    if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
        req.onreadystatechange = processReqChange;
        req.open("GET", url, true);
        req.send(null);
    } else if (window.ActiveXObject) {
        isIE = true;
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
            req.onreadystatechange = processReqChange;
			req.open("GET", url, true);
            req.send();
        }
    }
}

function processReqChange(){
	if(document.getElementById(destino)){
		var elemento = document.getElementById(destino);
	    elemento.innerHTML = " Cargando…" + req.readyState;
		if(req.readyState == 4)
		{
	   		if(req.status==200)
			{
				elemento.innerHTML = req.responseText;
			}
	    }
	}
}