setInterval(function(){jQuery.post('/cn/admin/inc/OnLineUpdate.asp?UserUrl=\%2Fcn\%2Findex.html');},20000);
/**
<script language=javascript>setInterval(function(){jQuery.ajax({type:'post',url:'admin/inc/OnLineUpdate.asp?UserUrl=%2Fcn%2Findex%2Ehtml',async:true});},20000);</script>
**/