XMLHTTP方式读服务器时间（可在服务器端: s.asp自行插入读数据库代码）:
客户端time.htm
<script language=JavaScript>
function getonlinenum()
{
var objXMLHTTP=new ActiveXObject("MICROSOFT.XMLHTTP");
objXMLHTTP.open("GET","s.asp",false);
objXMLHTTP.send("");
var strReturn=objXMLHTTP.ResponseText;
online_num.innerHTML="server time:" + strReturn;
}
</script>
</head>
<body onload="setInterval('getonlinenum()',1000)">
<span id=online_num></span>
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服务器端: s.asp
<%Response.Expires=-1
response.ContentType ="text/xml"%>
<?xml version='1.0' encoding='gb2312'?>
<%=now()%>
