function __firefox()
{ 
HTMLElement.prototype.__defineGetter__("runtimeStyle", __element_style); 
window.constructor.prototype.__defineGetter__("event", __window_event); 
Event.prototype.__defineGetter__("srcElement", __event_srcElement); 
} 

function __element_style()
{ 
return this.style; 
} 

function __window_event()
{ 
return __window_event_constructor(); 
} 
function __event_srcElement()
{ 
return this.target; 
} 
function __window_event_constructor()
{ 
if(document.all)
{ 
   return window.event; 
} 
var _caller = __window_event_constructor.caller; 
while(_caller!=null)
{ 
   var _argument = _caller.arguments[0]; 
   if(_argument)
   { 
    var _temp = _argument.constructor; 
    if(_temp.toString().indexOf("Event")!=-1)
    { 
     return _argument; 
    } 
   } 
   _caller = _caller.caller; 
} 
return null; 
} 

if(window.addEventListener)
{ 
__firefox(); 
} 
/*end firefox*/