b1 = new Image();
        b1.src = "/img/b1.gif";
        b1h = new Image();
        b1h.src = "/img/b1h.gif";
        b2 = new Image();
        b2.src = "/img/b2.gif";
        b2h = new Image();
        b2h.src = "/img/b2h.gif";
        b3 = new Image();
        b3.src = "/img/b3.gif";
        b3h = new Image();
        b3h.src = "/img/b3h.gif";
        b4 = new Image();
        b4.src = "/img/b4.gif";
        b4h = new Image();
        b4h.src = "/img/b4h.gif";
        b5 = new Image();
        b5.src = "/img/b5.gif";
        b5h = new Image();
        b5h.src = "/img/b5h.gif";
        b6 = new Image();
        b6.src = "/img/b6.gif";
        b6h = new Image();
        b6h.src = "/img/b6h.gif";
        b7 = new Image();
        b7.src = "/img/b7.gif";
        b7h = new Image();
        b7h.src = "/img/b7h.gif";
        b8 = new Image();
        b8.src = "/img/b8.gif";
        b8h = new Image();
        b8h.src = "/img/b8h.gif";
        
        b1_2 = new Image();
        b1_2.src = "/img/b1_2.gif";
        b1h_2 = new Image();
        b1h_2.src = "/img/b1h_2.gif";
        b1_2h = new Image();
        b1_2h.src = "/img/b1_2h.gif";
        b1h_2h = new Image();
        b1h_2h.src = "/img/b1h_2h.gif";

        b2_3 = new Image();
        b2_3.src = "/img/b2_3.gif";
        b2h_3 = new Image();
        b2h_3.src = "/img/b2h_3.gif";
        b2_3h = new Image();
        b2_3h.src = "/img/b2_3h.gif";
        b2h_3h = new Image();
        b2h_3h.src = "/img/b2h_3h.gif";

        b3_4 = new Image();
        b3_4.src = "/img/b3_4.gif";
        b3h_4 = new Image();
        b3h_4.src = "/img/b3h_4.gif";
        b3_4h = new Image();
        b3_4h.src = "/img/b3_4h.gif";
        b3h_4h = new Image();
        b3h_4h.src = "/img/b3h_4h.gif";

        b4_5 = new Image();
        b4_5.src = "/img/b4_5.gif";
        b4h_5 = new Image();
        b4h_5.src = "/img/b4h_5.gif";
        b4_5h = new Image();
        b4_5h.src = "/img/b4_5h.gif";
        b4h_5h = new Image();
        b4h_5h.src = "/img/b4h_5h.gif";

        b5_6 = new Image();
        b5_6.src = "/img/b5_6.gif";
        b5h_6 = new Image();
        b5h_6.src = "/img/b5h_6.gif";
        b5_6h = new Image();
        b5_6h.src = "/img/b5_6h.gif";
        b5h_6h = new Image();
        b5h_6h.src = "/img/b5h_6h.gif";

        b6_7 = new Image();
        b6_7.src = "/img/b6_7.gif";
        b6h_7 = new Image();
        b6h_7.src = "/img/b6h_7.gif";
        b6_7h = new Image();
        b6_7h.src = "/img/b6_7h.gif";
        b6h_7h = new Image();
        b6h_7h.src = "/img/b6h_7h.gif";

        b7_8 = new Image();
        b7_8.src = "/img/b7_8.gif";
        b7h_8 = new Image();
        b7h_8.src = "/img/b7h_8.gif";
        b7_8h = new Image();
        b7_8h.src = "/img/b7_8h.gif";
        b7h_8h = new Image();
        b7h_8h.src = "/img/b7h_8h.gif";
        



function chImg(k, kh, l, lh, m, mh) {
        document.images[k].src = eval(kh + ".src");
        document.images[l].src = eval(lh + ".src");
        document.images[m].src = eval(mh + ".src");
}