var m=1;
var n=Math.floor(Math.random()*m+1);
switch(n)
{
case 1:
document.writeln("<a href=\"go.php?http:\/\/foodinchina.taobao.com\" target=\"_blank\" onclick=\"'271';\"><img src=\"ads\/taobao.png\"  border=\"0\"  alt=\"美食中国淘宝店\"><\/a>");
break;
}