function isDemoOk(){     IsOk=true;     bver=Math.round(parseFloat(navigator.appVersion) * 1000);     if (navigator.appName.substring(0,8) == "Netscape")     {         if ((bver<5000) && (navigator.appVersion.indexOf("Mac")> 0))             IsOk=false;         else if (bver<4060)             IsOk=false;     }	 if (navigator.appName.substring(0,9) == "Microsoft")     {         if(bver<4000)             IsOk=false;     }     plugins=navigator.plugins;     if (plugins!=null && IsOk==false)     {         for(i=0;i!=plugins.length;i++)              if((plugins[i].name.indexOf("1.0")<0) && (plugins[i].name.indexOf("Java Plug-in")>=0))                  IsOk=true;     }     return IsOk;}function openDemo(htmlFile,htmlWidth,htmlHeight){var bua = navigator.userAgent;     s = 'resizable=0,toolbar=0,menubar=0,scrollbars=0,status=0,location=0,directory=0,width=350,height=200';     if(!isDemoOk())     {          open("http://www.alphaomegacom.com/error.html",'',s);     }     else     {     if (bua.indexOf("Opera")!= -1)       {          window.open(htmlFile+".htm",'','width='+htmlWidth+',height='+htmlHeight+',top=10,left=10');      }     else      {          window.open(htmlFile+".htm",'','width='+htmlWidth+',height='+htmlHeight+',top=10,left=10');      }      }}