function get_random()
        {
        var ranNum= Math.floor(Math.random()*8);
        return ranNum;
        }
        var whichImg=get_random();

        function show_image() {

        var img=new Array(8)
        img[0]="images/homeHeader.jpg";
        img[1]="images/homeHeader1.jpg";
        img[2]="images/homeHeader2.jpg";
        img[3]="images/homeHeader3.jpg";
        img[4]="images/homeHeader2.jpg";
        img[5]="images/homeHeader2.jpg";
        img[6]="images/homeHeader3.jpg";
        img[7]="images/homeHeader.jpg";

        document.write("<img src='");
        document.write(img[whichImg]);
        document.write("' border='0' />");
        }