/**
Written by Peter Wilkinson of http://dynamic-tools.net
Feel free to use or modify this script for any purpose.  I'd appreciate you leaving
this header in though.
*/
/*
Usage: 
addEvent(object, 'eventName', functionName); 
e.g.
addEvent(window, 'load', init); 
NB: ensure this script is the first to be included int the header
*/

function addEvent(elem, eventType, handler)
{
  if (!elem.eventHandlers) elem.eventHandlers = [];
  if (!elem.eventHandlers[eventType])
  {
    elem.eventHandlers[eventType] = [];
    if (elem['on' + eventType]) elem.eventHandlers[eventType].push(elem['on' + eventType]);
    elem['on' + eventType] = handleEvent;
  }
  elem.eventHandlers[eventType].push(handler);
}

function removeEvent(elem, eventType, handler)
{
  var handlers = elem.eventHandlers[eventType];
  for (var i in handlers) if (handlers[i] == handler) delete handlers[i];
}

function handleEvent(e)
{
  var returnValue = true;
  if (!e) e = fixEvent(event);
  var handlers = this.eventHandlers[e.type]
  for (var i in handlers)
  {
    this.$$handleEvent = handlers[i];
    returnValue = !((returnValue && this.$$handleEvent(e)) === false);
  }
  return returnValue;
}

function fixEvent(e)
{
  // add W3C standard event methods
  e.preventDefault = fixEvent.preventDefault;
  e.stopPropagation = fixEvent.stopPropagation;
  return event;
};

fixEvent.preventDefault = function()
{
  this.returnValue = false;
};

fixEvent.stopPropagation = function()
{
  this.cancelBubble = true;
};