var req;
        var iddiv;
	function retrieveURL(url, p_iddiv)
	{
		var argv = retrieveURL.arguments;
		var argc = argv.length;

		iddiv = argv[1];

		document.getElementById(iddiv).innerHTML="";
		var nuevoTexto = document.createTextNode("Cargando ...");
		document.getElementById(iddiv).appendChild(nuevoTexto);

		if (window.XMLHttpRequest) // Non-IE browsers
		{
			req = new XMLHttpRequest();
			req.onreadystatechange = processStateChange;
			try
			{
				req.open("GET", url, true);
			}
			catch (e)
			{
				alert(e);
			}
			req.send(null);
		}
		else if (window.ActiveXObject) // IE
		{
			req = new ActiveXObject("Microsoft.XMLHTTP");			
			if (req)
			{
				req.onreadystatechange = processStateChange;
				req.open("GET", url, true);
				req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
				req.setRequestHeader("Accept-Charset", "UTF-8");
				req.send();
			}
		}
	}

        function processStateChange()
        {
		if (req.readyState == 4) // Complete
		{
			if (req.status == 200) // OK response
			{
				document.getElementById(iddiv).innerHTML = req.responseText;
			}
			else
			{
				alert("Problem: " + req.statusText);
			}
		}
	}