var img = new Array();
img[01] = new Image();  img[01].src="../im/b1.gif";
img[02] = new Image();  img[02].src="../im/b1s.gif";
img[03] = new Image();  img[03].src="../im/b2.gif";
img[04] = new Image();  img[04].src="../im/b2s.gif";
img[05] = new Image();  img[05].src="../im/b3.gif";
img[06] = new Image();  img[06].src="../im/b3s.gif";
img[07] = new Image();  img[07].src="../im/b4.gif";
img[08] = new Image();  img[08].src="../im/b4s.gif";
img[09] = new Image();  img[09].src="../im/b5.gif";
img[10] = new Image();  img[10].src="../im/b5s.gif";
img[11] = new Image();  img[11].src="../im/b6.gif";
img[12] = new Image();  img[12].src="../im/b6s.gif";

function change(nam,num) {
        if(navigator.appVersion.charAt(0)>= 3) {
                document.images[nam].src = img[num].src;
        }
}