var ads = [];
ads.push(['<a href="http://v.pplot.cn" target="blank"><img src=http://img4.user.55.la:81/anonymous/banner/2011/08/20/18/8132300.gif></a>', 0, 0]);
ads.push(['<a href="http://www.ppdm.us/thread-17404-1-1.html" target="blank"><img src=http://img4.user.55.la:81/anonymous/banner/2011/09/02/22/8169214.gif></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]);