function NuevoAjax(){
		
	var xmlhttp=false; 
		try { 
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP"); 
		} 
		catch (e) { 
			try { 
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
			} 
			catch (E) { 
				xmlhttp = false; 
			} 
		}
		if (!xmlhttp && typeof XMLHttpRequest!='undefined') { 
			xmlhttp = new XMLHttpRequest();
		}
		return xmlhttp;
}
	
function aleatorio(inferior,superior){ 
		numPosibilidades = superior - inferior 
		aleat = Math.random() * numPosibilidades 
		aleat = Math.round(aleat) 
		return parseInt(inferior) + aleat 
}
function AbrirVentana(theURL,winName,features)
{
   
	neu=window.open(theURL,winName,features);
	neu.focus()
	neu.moveTo(Math.round((screen.availWidth-952)/2),Math.round((screen.availHeight-240)/2))  
}