function openWindow(theURL,winName,features, myWidth, myHeight, isCenter)
   {
     if(window.screen)if(isCenter)if(isCenter=="true")
     {
       var myLeft = (screen.width-myWidth-460)/2;
       var myTop = (screen.height-myHeight-290)/2;
       features+=(features!='')?',':'';
       features+=',left='+myLeft+',top='+myTop;
     }
     window.open(theURL,winName,features+((features!='')?',':'')+'width='+myWidth+',height='+myHeight);
   }