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