document.write ('<br>');
var how_many_ads = 2;
var now = new Date();
var sec = now.getSeconds();
var ad = sec % how_many_ads;
ad +=1;
if (ad==1) {
var msg1="<a href=http://www.jihao.com.cn target=_blank><img src=http://www.123hao.net/gg/bannertop.gif width=468 height=60 border=0 alt=上海二手网></a>"
document.write(msg1)
}
if (ad==2) {
var msg1="<a href=http://www.jihao.com.cn target=_blank><img src=http://www.123hao.net/gg/bannertop.gif width=468 height=60 border=0 alt=上海二手网></a>"
document.write(msg1)
}