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