shu=5
theAds = new Array();
theAds[1] = "<a href=http://www.jswb-fair.com/'  target='_blank'><img src='http://www.365f.com/adnew/jswb1007291.jpg'></a>";

theAds[2] = "<a href='' target='_blank'><img src='http://www.365f.com/adnew/bbs.jpg'></a>";

theAds[3] = "<a href='' target='_blank'><img src='http://www.365f.com/ad_pd/fdb95090.gif'></a>";

theAds[4] = "<a href='' target='_blank'><img src='http://pics.cnjiaju.com/62/content_messages.2387.file1.jpg'></a>";

theAds[5] = "<a href='http://www.cnjiaju.com/caigoujie/index.html' target='_blank'><img src='http://pics.cnjiaju.com/32/content_messages.2388.file1.jpg'></a>";

sx = parseInt(Math.random()*shu+1);
document.write(theAds[sx]);