求助：限定同一用户名同一时间登录个数的解决方案
说明一下：1，就是要求一般的用户，一个账号在同一时间只能有一个人在登陆，不能出现有很多的人，在不同的电脑上同时登陆的这种情况。
2，如果是一个集体的用户，可以让一个账号同时有3到5个人同时登陆，也就是说登陆的人数不能大于上线。
能解决两个更好，只能解决第一个的也可以，有高手的愿意帮我的请联系：519389079
<!--#include file="conn.asp"-->
<!--#include file="ConnUser.asp"-->
<!--#include file="config.asp"-->
<!--#include file="char.inc"-->
<%
response.cookies(Forcast_SN)("UserName")=""
response.cookies(Forcast_SN)("KEY")=""
response.cookies(Forcast_SN)("purview")=""
response.cookies(Forcast_SN)("fullname")=""
response.cookies(Forcast_SN)("reglevel")=""
response.cookies(Forcast_SN)("shenhe")=""
response.cookies(Forcast_SN)("ViewUrl")="Admin_login.asp"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<LINK href=site.css rel=stylesheet>
<title><%=copyright%><%=version%><%=ver%></title>
<script language="JavaScript">
<!--
if (self != top) top.location.href = window.location.href
//-->
</script>
<script language=javascript>
function CheckFormUserLogin()
{
if(document.UserLogin.UserName.value=="")
{
alert("请输入用户名！");
document.UserLogin.UserName.focus();
return false;
}
if(document.UserLogin.Passwd.value == "")
{
alert("请输入密码！");
document.UserLogin.Passwd.focus();
return false;
}
if(document.UserLogin.verifycode.value == "")
{
alert("请输入验证码！");
document.UserLogin.verifycode.focus();
return false;
}
}
</script>
<style type="text/css">
<!--
.style1 {
font-size: 10.5pt;
font-weight: bold;
}
-->
</style>
</head>
<body bgcolor="#ffffff" topmargin="0" marginheight="0">
<br>
<br>
<form method="POST" action="ChkLogin.asp" name="UserLogin" onSubmit="return CheckFormUserLogin();">
<table border="0" width="750" align="center" cellspacing="0" cellpadding="0">
<tr>
<td height="78" background="IMAGES/admin_1.gif" align="center">
<br> <%=copyright%> <%=version%> <%=ver%>
</td>
</tr>
<tr>
<td height="120" background="IMAGES/admin_2.gif">
<table border="0" width="90%" align="center" cellspacing="0" cellpadding="0">
<tr>
<td><span class="style1"><font color=red>用 户 登 录</font></span><br><br></td>
</tr>
<tr>
<td>
用户名：<input name="UserName" size="15" font face="宋体" style="font-size: 9pt; background-color:#EAEAF4">
密 码：<input type="password" name="Passwd" size="15" font face="宋体" style="font-size: 9pt; background-color:#EAEAF4">
验证码：
<%
Function getcode1()
Dim test
On Error Resume Next
Set test=Server.CreateObject("Adodb.Stream")
Set test=Nothing
If Err Then
Dim zNum
Randomize timer
zNum = cint(8999*Rnd+1000)
Session("verifycode") = zNum
getcode1= Session("verifycode")
Else
getcode1= "<img src=""getcode.asp"" onclick='this.src=""getcode.asp#""+new Date().getTime()'title=""看不清？点击刷新"" style=""padding: 4px;""/>"
End If
End Function
%>
<input type="text" name="verifycode" size="15" font face="宋体" style="font-size: 9pt; background-color:#EAEAF4"><b><span><font color=#000000><%=getcode1()%></font></span></b>
<input type="submit" name="Submit" value="确定" style="font-size: 9pt; background-image:url(./images/btn2.gif); width: 40px; height: 20px; cursor: hand; border-style: none; background-color: transparent; color: Black;" title="确定">
<input type="reset" name="Submit2" value="重输" style="font-size: 9pt; background-image:url(./images/btn2.gif); width: 40px; height: 20px; cursor: hand; border-style: none; background-color: transparent; color: Black;" title="重输">
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td height="82" background="IMAGES/admin_3.gif">
</td>
</tr>
</table>
</form>
</body>
</html>
关键是我不会做啊
