// JavaScript Document
function openPopUp(url, ancho, alto){
		$('popup').innerHTML='';
		$('popup').style.width=ancho+"px";
		$('popup').style.height=alto+"px";
		new Ajax.Updater('popup',url, {			 
			method: 'get'
		});
		$("popup").style.visibility='visible';
	}
	
function cerrar(div){
	$(div).style.visibility='hidden';
}