function abrirventana(url) {
   var ancho=500 //screen.width/2-30;
   var myLeft =(screen.width-500)/2;;
   var myTop = (screen.height-600)/2;
propiedades="top="+ myTop +", left=" + myLeft +",width="+ ancho+",height=600,alwaysRaised=yes,scrollbars=yes"
   ventana=open(url,"ventanafoto",propiedades);
}
function abrirventana2(url) {
   var ancho=500;
   var myLeft =ancho+30;
   var myTop = (screen.height-600)/2;
propiedades="top="+ myTop +", left=" + myLeft +",width="+ ancho+",height=600,alwaysRaised=yes,scrollbars=yes"
   ventana=open(url,"ventanaTexto",propiedades);
}

function abrirventana4(url) {
   var myLeft =(screen.width-700)/2;
   var myTop = (screen.height-500)/2;
   propiedades="top="+ myTop +", left=" + myLeft +",width=700,height=500,alwaysRaised=yes,scrollbars=yes"
   ventana=open(url,"ventana",propiedades);
}

function desapareceCapa(capa){
  document.getElementById('CAPA').style.visibility='hidden';
 return true;
  }
  
  function ApareceCapa(texto){
    document.getElementById('CAPA').style.visibility='visible';
	document.f1.nombre.value=texto;
	return true;
  }
function findScrollTop() {
			if (document.body.scrollTop != null) return document.body.scrollTop;
			if (window.pageYOffset != null) return window.pageYOffset;
			return (null);
		}
		
function moveMenuBar() {
				var object=document.getElementById('CAPA');
				var y = findScrollTop();
				if (y < 5) y = 5;
				object.style.visibility='hidden';				
				object.style.top = y + 'px';	
				}