//Abre las ventanas secundarias
function ventanaSecundaria (URL, ancho, alto, barra_desplazamiento){
//   window.open(URL,"ventana1","width=120,height=300,scrollbars=yes")
   window.open(URL,"ventana1","width="+ancho+",height="+alto+",scrollbars="+barra_desplazamiento)
}