var m=2; //共几个广告随机显示
var n=Math.floor(Math.random()*m+1)
switch(n)
{  
case 1: 
document.writeln("<iframe scrolling=no width=650 height=90 frameborder=0 src=\"http:\/\/code1.2bj.cc:8899\/lbclick.html?adid=470|469|393|295&uid=44123210\" marginwidth=\"0\" marginheight=\"0\" vspace=\"0\" hspace=\"0\"><\/iframe>");
break;
case 2: 
document.writeln("<iframe scrolling=no width=650 height=90 frameborder=0 src=\"http:\/\/code1.2bj.cc:8899\/lbclick.html?adid=294|204&uid=44123210\" marginwidth=\"0\" marginheight=\"0\" vspace=\"0\" hspace=\"0\"><\/iframe>");
break;
}