function addEvent(obj, evType, fn)
{
    if (obj.addEventListener)
    {
       obj.addEventListener(evType, fn, false);
       return true;
    }
    else if (obj.attachEvent)
    {
       var r = obj.attachEvent("on"+evType, fn);
       return r;
    } 
    else
    {
       return false;
    }
}