function AttachEvent(elementObj, eventName, eventHandlerFunctionName)
{
  if (elementObj.addEventListener)
  {
    elementObj.addEventListener(eventName, eventHandlerFunctionName, false);
  }
  else if (elementObj.attachEvent)
  {
    elementObj.attachEvent('on' + eventName, eventHandlerFunctionName);
  }
  else
  {
    var currentEventHandler = elementObj['on' + eventName];
    if (currentEventHandler == null)
    {
      elementObj['on' + eventName] = eventHandlerFunctionName;
    }
    else
    {
      elementObj['on' + eventName] = function(e) { currentEventHandler(e); eventHandlerFunctionName(e); }
    }
  }
}