<!--
function abrir_ventana(url,largo,ancho,barras){
//ej: onClick="abrir_ventana('ventana.asp',300,400,'no')"
topPos = (screen.availHeight-ancho)/2;
leftPos = (screen.availWidth-largo)/2;
window.open(url,'',"status=no,resizable=no,toolbar=no,location=no,scrollbars="+barras+",menubar=0,width="+largo+",height="+ancho+",top="+topPos+",left="+leftPos);
}
//-->