1 //=====================================================================

     2 // Event Listener

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

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

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

     6 //=====================================================================

     7 function firetree_addEvent(obj, evType, fn)

     8 {

     9   if(obj.id){

    10     if(!document._callbacks_by_id)

    11         document._callbacks_by_id=new Array();

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

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

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

    15     fn=callback;

    16   }

    17 

    18   if(obj.addEventListener){

    19     obj.addEventListener(evType, fn, false); 

    20     return true;

    21   } else if (obj.attachEvent){

    22     var r = obj.attachEvent('on'+evType, fn);

    23     return r;

    24   } else {

    25     return false;

    26   }

    27 

    28   function callback(e)

    29   {

    30     var n;

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

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

    33     else                   return;

    34 

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

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

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

    38   }

    39 }