var ic = 7;
var theImages = new Array(ic);

theImages[0] = 'Images/BannerImage/image1.png';
theImages[1] = 'Images/BannerImage/image2.jpg';
theImages[2] = 'Images/BannerImage/image3.jpg';
theImages[3] = 'Images/BannerImage/image4.jpg';
theImages[4] = 'Images/BannerImage/image5.jpg';
theImages[5] = 'Images/BannerImage/image6.jpg';
theImages[6] = 'Images/BannerImage/image7.jpg';

function pickRandom(range) 
    { if (Math.random) return Math.round(Math.random() * (range-1)); else { var now 
        = new Date(); return (now.getTime() / 1000) % range; } }       

function showImage(){            
    return('<img src="'+ theImages[pickRandom(ic)]+ '" height="150" width="497" border="0" alt="Delaware State Education Association">');         
}