var ads = [];
ads.push(['<a href="http://www.wwewwf.cn/index.php/playlist/view/388" target="_blank"><img src="http://www.wwewwf.cn/attachments/images/201008/20100816165329_9022.jpg" height="286" width="285" border="0"></a>', 0, 0]);
var index = Math.floor(Math.random()*ads.length);
var today = new Date();
var i = 0;
while(((ads[index][1] > 0 && ads[index][1] * 1000 > today) 
|| ((ads[index][2] > 0 && ads[index][2] * 1000 < today))) 
&& i < 30) {
index = Math.floor(Math.random()*ads.length);
i++;
}
document.write(ads[index][0]);