Mine

part {
	 name:          "b1";
	 mouse_events:  0;
	 description {
	    state:    "default" 0.0;
	    rel1 {
	       relative: 1.0  1.0;
	       offset:   -4   0;
	       to_y:     "t3";
	    }
	    rel2 {
	       relative: 1.0  0.0;
	       offset:   -1   -1;
	       to_y:     "b2";
	    }
	    image {
	       normal: "e17_border4.png";
	    }
	    fill {
	       smooth: 0;
	    }
	 }
	 description {
	    state:    "hidden" 0.0;
	    visible:  0;
	    rel1 {
	       relative: 1.0  1.0;
	       offset:   0    0;
	       to_y:     "t3";
	    }
	    rel2 {
	       relative: 1.0  0.0;
	       offset:   -1   -1;
	       to_y:     "b2";
	    }
	    image {
	       normal: "e17_border4.png";
	    }
	    fill {
	       smooth: 0;
	    }
	 }
      }
      part {
	 name:          "b2";
	 mouse_events:  0;
	 description {
	    state:    "default" 0.0;
	    rel1 {
	       relative: 1.0  1.0;
	       offset:   -4   -4;
	    }
	    rel2 {
	       relative: 1.0  1.0;
	       offset:   -1   -1;
	    }
	    image {
	       normal: "e17_border5.png";
	    }
	    fill {
	       smooth: 0;
	    }
	 }
	 description {
	    state:    "hidden" 0.0;
	    visible:  0;
	    rel1 {
	       relative: 1.0  1.0;
	       offset:   0    0;
	    }
	    rel2 {
	       relative: 1.0  1.0;
	       offset:   -1   -1;
	    }
	    image {
	       normal: "e17_border5.png";
	    }
	    fill {
	       smooth: 0;
	    }
	 }
      }