var m=1;
var n=Math.floor(Math.random()*m+1);
switch(n)
{
case 1:
document.writeln("<a href=\"http:\/\/www.mkceo.com\/category\/pc\" target=\"_blank\" onclick=\"'265';\"><img src=\"http:\/\/www.mkceo.com\/static\/images\/ad1.gif\"  border=\"0\"  alt=\"玫琳凯首席网\"><\/a>");
break;
}