function Ampliar(foto, ancho, alto)
{
	alto += 15;
	var win= null;
	var winl = (screen.width-ancho)/2;
	var wint = (screen.height-alto)/2
	settings='height='+alto+',width='+ancho+',top='+wint+',left='+winl+',scrollbars=no,fullscreen=no,toolbar=no,location=no,directories=no,status=no,menubar=auto,resizable=no'
	win=window.open("zoom.asp?foto="+foto,"ampliacion",settings)
	
	if(parseInt(navigator.appVersion) >= 4){win.window.focus();}
}