var m=1;
var n=Math.floor(Math.random()*m+1);
switch(n)
{
case 1:
document.writeln("<a href=\"http:\/\/spcode.baidu.com\/spcode\/spClick?tn=ylmf_sp&ctn=0&styleid=1&tourl=http:\/\/www.amazon.cn?source=uapcpa_ylmf_sp\"><img src=\"static\/images\/banner\/120_60.gif\" alt=\"卓越购书\" \/ ><\/a>");
document.writeln("<a href=\"http:\/\/u.115.com\/?13\"><img src=\"http:\/\/www.114la.com\/image\/115-u_1.gif\" alt=\"115网络U盘\" \/ ><\/a>");
document.writeln("<a href=\"http:\/\/spcode.baidu.com\/spcode\/spClick?tn=ylmf_sp&ctn=0&styleid=1&tourl=http:\/\/union.dangdang.com\/transfer\/transfer.aspx?from=P-267723-ylmf_sp&backurl=http:\/\/www.dangdang.com\"><img src=\"static\/images\/banner\/dangdang-120.gif\" alt=\"当当网\" \/ ><\/a>");
break;
}