//Ëæ»ú¹ã¸æ´úÂë
tips = new Array(1);
tips[0] = '<a href="http://www.backhid.com/Category/bule_info.asp?id=22" target="_blank"><img src="/images/ad_1.jpg" width="151" height="342" border="0" /></a>';
index = Math.floor(Math.random() * tips.length);
document.write(tips[index]);