Itteration über ein Objekt - Fehler!?!

[Overview]

Problem gelöst!
Just for the Record:

  
    $.each(box_object.connectiondata_parent, function(it, obj){  
  
        if(typeof(obj) != "undefined" && obj.linepoint == "top"){  
            var point_position_top = new Object();  
            point_position_top.left = startingpoint_left;  
            point_position_top.top = startingpoint_top;  
            obj.position = point_position_top;  
        }else if(typeof(obj) != "undefined" && obj.linepoint == "bottom"){  
            var point_position_bottom = new Object();  
            point_position_bottom.left = startingpoint_left;  
            point_position_bottom.top = startingpoint_bottom;  
            obj.position = point_position_bottom;  
        }else{}  
  
    });