/*
	Original idea by John Resig
	Tweaked by Scott Andrew LePera, Dean Edwards and Peter-Paul Koch
*/

function addEvent( obj, type, fn )
{
	if (obj.addEventListener)
		obj.addEventListener( type, fn, false );
	else if (obj.attachEvent)
	{
		obj["e"+type+fn] = fn;
		obj.attachEvent( "on"+type, obj["e"+type+fn] );
	}
}

function removeEvent( obj, type, fn )
{
	if (obj.detachEvent)
	{
		obj.detachEvent( "on"+type, obj["e"+type+fn] );
		obj["e"+type+fn] = null;
	}
	else if (obj.removeEventListener)
		obj.removeEventListener( type, fn, false );
}