theAds = new Array();  

theAds[0] = "<a href=\"http://newchat.sina.com.cn/love/\"><img src=../libagif/gg_ccss0001.gif border=1></a>";  
theAds[1] = "<a href=\"http://sports.sina.com.sg/\"><img src=../libagif/gg_ccss0002.gif border=1></a>"; 
theAds[2] = "<a href=\"http://www.creative.com/\"><img src=../libagif/gg_ccss0003.gif border=1></a>";

var rand = Math.round(Math.random()*10); 

while (rand >2) 
{    rand = Math.round(Math.random()*10); } 

document.write(theAds[rand]);