//### POP UP #####################################################
function abrirVentana(URL,ancho,alto){ 
	var centrarX = (screen.width-ancho)/2;
	var centrarY = (screen.height-alto)/2;
	var abrir = window.open(URL,"ventana1","width=800,height=435,top="+centrarY+",left="+centrarX+",scrollbars=YES,resizable=NO,location=NO")
		if (abrir == undefined){ 
		alert("No se pudo abrir la ventana.\nAsegurate de no tener bloquear ventanas activado.");
	}
}