var m=5;
var n=Math.floor(Math.random()*m+1);
switch(n)
{
case 1:
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case 2:
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case 3:
document.writeln("<a href=\"http:\/\/aq.115.com\/?v113\" target=\"_blank\" style=\"color:#000000;\" onclick=\"'226';\" >体验云查杀-免费在线查杀木马<\/a>");
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case 4:
document.writeln("<a href=\"http:\/\/spcode.baidu.com\/spcode\/spClick?tn=ylmf_sp&ctn=0&styleid=3338&tourl=http:\/\/www.28.com\/?comeID=96888\" target=\"_blank\" style=\"color:#178517;\" onclick=\"'228';\" >小本创业，商机无限！<\/a>");
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case 5:
document.writeln("<a href=\"http:\/\/www.duba.net\/out_iframe\/mid\/rf\/index.shtml\" target=\"_blank\" style=\"color:#000000;\" onclick=\"'245';\" >怎样上网更安全？888小时免费杀毒软件<\/a>");
break;
}
