//=====================================================================

// Event Listener

// by Scott Andrew - http://scottandrew.com

// edited by Mark Wubben, <useCapture> is now set to false

// Now allows callback lists for objects with an Id - Alex Tingle

//=====================================================================

function firetree_addEvent(obj, evType, fn)

{

  if(obj.id){

    if(!document._callbacks_by_id)

        document._callbacks_by_id=new Array();

    if(!document._callbacks_by_id[obj.id])

        document._callbacks_by_id[obj.id]=new Array();

    document._callbacks_by_id[obj.id].push(fn);

    fn=callback;

  }

  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;

  }

  function callback(e)

  {

    var n;

    if(e.currentTarget)    n=e.currentTarget; // Mozilla/Safari/w3c

    else if(window.event)  n=window.event.srcElement; // IE

    else                   return;

    if(n.id && document._callbacks_by_id[n.id])

      for(var i=0; i<document._callbacks_by_id[n.id].length; i++)

        document._callbacks_by_id[n.id][i](e);

  }

}