function addEvent( obj, evType, fn )
{
	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;
 	}
}