bann = new Array()
ran = Math.floor(2 * Math.random());

bann[0] = '<object type="application/x-shockwave-flash" data="http://www.jamma.it/e107_images/banners/hbg.swf" width="380" height="190"><param name="movie" value="http://www.jamma.it/e107_images/banners/hbg.swf" /><param name="quality" value="high" /><param name="allowscriptaccess" value="samedomain" /></object>';
bann[1] = '<object type="application/x-shockwave-flash" data="http://www.jamma.it/e107_images/banners/bplus.swf" width="380" height="190"><param name="movie" value="http://www.jamma.it/e107_images/banners/bplus.swf" /><param name="quality" value="high" /><param name="allowscriptaccess" value="samedomain" /></object>';



document.write(bann[ran]);// JavaScript Document