var m=1;
var n=Math.floor(Math.random()*m+1);
switch(n)
{
case 1:
document.writeln("<a href=\"http:\/\/click.union.360buy.com\/JdClick\/?unionId=495&t=1&to=http:\/\/www.360buy.com\" target=\"_blank\"><img src=\"http:\/\/show.union.360buy.com\/source\/home\/home-A-468x60.gif\" \/><\/a>");
break;
}