function popUp(popupURL)
    {
    width = 700; height = 550; leftPosition = (screen.width) ? (screen.width-width)/2 : 0;
    if (screen.height && (screen.height <= 600)) { topPosition = 0; } else { topPosition = (screen.height) ? (screen.height-height)/2 : 0; }
    var settings='width='+width+',height='+height+',left='+leftPosition+',top='+topPosition+'toolbar=0,location=0,directories=0,menubar=0,scrollbar=0,resizable=0,status=0';
    var popup=window.open(popupURL, 'gamepopup', settings); 
    if (popup != null) popup.focus();
    }