i1= new Image(); i1.src = "new_index/left_select_left.jpg";
i2= new Image(); i2.src = "new_index/left_select_right.jpg";
i3= new Image(); i3.src = "new_index/right_select_left.jpg";
i4= new Image(); i4.src = "new_index/right_select_right.jpg";