function MM_checkPlugin(plgIn, theURL, altURL, autoGo) { //v4.0
  var ok=false; document.MM_returnValue = false;
  with (navigator) if (appName.indexOf('Microsoft')==-1 || (plugins && plugins.length)) {
    ok=(plugins && plugins[plgIn]);
  } else if (appVersion.indexOf('3.1')==-1) { //not Netscape or Win3.1
    if (plgIn.indexOf("Flash")!=-1 && window.MM_flash!=null) ok=window.MM_flash;
    else if (plgIn.indexOf("Director")!=-1 && window.MM_dir!=null) ok=window.MM_dir;
    else ok=autoGo; }
  if (!ok) theURL=altURL; if (theURL) window.location=theURL;
}
//-->
var winName="Formulario" 
function Abrir_Ventana(theURL,w,h) { 

var windowprops ="top=0,left=0,toolbar=no,location=no,status=no, menubar=no,scrollbars=yes, resizable=no,width=" + w + ",height=" + h;

window.open(theURL,winName,windowprops); 
}