function addHandler(obj, evt, handler)
    {
        if (obj.attachEvent)
        {
            obj.attachEvent('on' + evt, handler);
        }
        else if (obj.addEventListener)
        {
            obj.addEventListener(evt, handler, false);
        }
        else
        {
            alert('Either a wrong browser is used or a wrong code has been written. Make sure that you are using Internet Explorer or Firefox. If the problem persists, contact ServiceGoFor team.');
        }
    }