// JavaScript Document
		function abrirPopUp (URL, Titulo, x, y, tamx, tamy, scrolls) {
			if ((x==0) && (y==0))
			{
		 		x=(screen.width-tamx) / 2;
				y=(screen.height-tamy) / 2;
			}
			Ventana = window.open (URL, Titulo,'width='+tamx+', height='+tamy+', left='+x+', top='+y+', scrollbars='+scrolls+', status=NO');		
		}		
		function Centrar () 
		{
				x=(screen.width-document.body.clientWidth) / 2;
				y=(screen.height-document.body.clientHeight) / 2 - 50;
				moveTo (x, y);
		}