var bimg = new Array();
bimg[0] = new Image();  bimg[0].src = "/images/top2006/btn_mbl.gif"; 
bimg[1] = new Image();  bimg[1].src = "/images/top2006/btn_mbl_on.gif";
bimg[2] = new Image();  bimg[2].src = "/images/top/caffe_rand.gif"; 
bimg[3] = new Image();  bimg[3].src = "/images/top/caffe_rand_on.gif";
bimg[4] = new Image();  bimg[4].src = "/images/top/gerber.gif"; 
bimg[5] = new Image();  bimg[5].src = "/images/top/gerber_on.gif";

function changebannerIMG(bnam,bnum) {
document.images[bnam].src = bimg[bnum].src; }