function recibeid(_pagina,valorget,valorpost,capa)
{

	ajax=objetus(_pagina);
	
	if(valorpost!="")
	{
		ajax.open("POST", _pagina+"?"+valorget+"&tiempo="+new Date().getTime(),true);
	} 
	else 
	{
		ajax.open("GET", _pagina+"?"+valorget+"&tiempo="+new Date().getTime(),true);
	}
	
	ajax.onreadystatechange=function() 
	{
	
		if (ajax.readyState==1) // CARGANDO
		{
			document.getElementById(capa).innerHTML = "Aguarde por favor...";
		}
		
		if (ajax.readyState==4)  // CARGA FINALIADA
		{
			if(ajax.status==200)
			{document.getElementById(capa).innerHTML = ajax.responseText;}
			else if(ajax.status==404)
			{
				capa.innerHTML = "La direccion no existe";
			}
			else
			{
				capa.innerHTML = "Error: ".ajax.status;
			}
		}
	}
	
	if(valorpost!="")
	{
		ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
		ajax.send(valorpost);
	} 
	else 
	{
		ajax.send(null);
	}

}

function objetus(file) 
{
	xmlhttp=false;
	this.AjaxFailedAlert = "Habilite javascript en su navegador.\n";
	this.requestFile = file;
	this.encodeURIString = true;
	this.execute = false;
	
	if (window.XMLHttpRequest) 
	{ 
		this.xmlhttp = new XMLHttpRequest();
		
		if (this.xmlhttp.overrideMimeType) 
		{
			this.xmlhttp.overrideMimeType('text/xml');
		}
	}
	
	else if (window.ActiveXObject) 
	{ // IE
		try 
		{
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		}
		catch (e) 
		{
			try 
			{
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} 
			catch (e) 
			{
				this.xmlhttp = null;
			}
		}
		
		if (!this.xmlhttp && typeof XMLHttpRequest!='undefined') 
		{
			this.xmlhttp = new XMLHttpRequest();
			if (!this.xmlhttp)
			{
				this.failed = true;
			}
		}
	}
	return this.xmlhttp ;
}