var xmlHttp
function cargacontenido(cual)
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
	{
		alert ("Browser does not support HTTP Request")
		return
	} 
	var url=cual
	//url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged_unhabitat 
	xmlHttp.open("GET",url,true)
	//xmlHttp.open("POST",url,true)
	xmlHttp.send(null)
}

function stateChanged_unhabitat() 
{ 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
	{ 
	//document.getElementById("txtHint").innerHTML="<div id='10'>"+xmlHttp.responseText +"</div>"
	document.getElementById("contenido").innerHTML= xmlHttp.responseText;
	} 
	else
	{
	//document.getElementById("txtHint").innerHTML="Buscando...<img src='./Ajax/loading.gif' border='0'>";
	document.getElementById("contenido").innerHTML="Conectando <img src='./Ajax/loading.gif' border='0'> </div>";
	}
} 

function GetXmlHttpObject()
{ 
var objXMLHttp=null
if (window.XMLHttpRequest)
{
	objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
	objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}