function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
function Abrir_ventana (pagina) {
var opciones="toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,width=600,height=420,top=80,left=100";
window.open(pagina,"",opciones);
}