function viewPhoto(PhotoId)
    {
        // Constants that allow to customize the popup size.
        //
        var POPUP_WIDTH = 530;
        var POPUP_HEIGHT = 470;
        
        // Local variables to store the top left corner coordinates of
        // the screen centered popup.
        //
        var popupX;
        var popupY;
        
        // Calculate coordinates.
        //
        popupX = (screen.width - POPUP_WIDTH) / 2;
        popupY = (screen.height - POPUP_HEIGHT) / 2;
        
        // Show the popup!
        //
        window.open("viewPhoto.aspx?PhotoId=" + PhotoId, "", "directories=no," +
            "height=" + POPUP_HEIGHT + ",left=" + popupX +
            ",location=no,menubar=no,resizable=yes," +
            "screenX=" + popupX + ",screenY=" + popupY +
            ",scrollbars=yes,ststus=no,toolbar=no,top=" + popupY +
            ",width=" + POPUP_WIDTH, true);
    }