function MM_checkPlugin(plgIn, theURL, altURL, autoGo) 
{ 


  var ok=false; 
  document.MM_returnValue = false;
  with (navigator) 
  if (appName.indexOf('Microsoft')==-1) 
  ok=(plugins && plugins[plgIn]);
  else if (appVersion.indexOf('3.1')==-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;

}