请问网站的当前登陆用户显示是如何实现的?

[yangxz]

网站的当前在线用户显示是如何实现的?
关键问题是你如何知道用户什么时候已经离开了?

[subzero]

sub session_onend()
定一下session的超时

[mahui]

你用的session_onend()是asp里的吧?

[crick]

加
<script language="JavaScript">
<!--
var caution = false
function setCookie(name, value, expires, path, domain, secure) {
var curCookie = name + "=" + escape(value) +
((expires) ? "; expires=" + expires.toGMTString() : "") +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
((secure) ? "; secure" : "")
if (!caution || (name + "=" + escape(value)).length <= 4000)
document.cookie = curCookie
else
if (confirm("Cookie exceeds 4KB and will be cut!"))
document.cookie = curCookie
}
function getCookie(name) {
var prefix = name + "="
var cookieStartIndex = document.cookie.indexOf(prefix)
if (cookieStartIndex == -1)
return null
var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length)
if (cookieEndIndex == -1)
cookieEndIndex = document.cookie.length
return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex))
}
function deleteCookie(name, path, domain) {
if (getCookie(name)) {
document.cookie = name + "=" +
((path) ? "; path=" + path : "") +
((domain) ? "; domain=" + domain : "") +
"; expires=Thu, 01-Jan-70 00:00:01 GMT"
}
}
function fixDate(date) {
var base = new Date(0)
var skew = base.getTime()
if (skew > 0)
date.setTime(date.getTime() - skew)
}
var now = new Date()
fixDate(now)
now.setTime(now.getTime() + 365 * 24 * 60 * 60 * 1000)
var visits = getCookie("counter")
if (!visits)
visits = 1
else
visits = parseInt(visits) + 1
setCookie("counter", visits, now)
document.write("欢迎您第 " + visits + " 次来到本站点")
// -->
</script>

[crick]

还加上
<script language="javascript">
<!--
var username = GetCookie('username');
if (username == null) {
username = prompt('第一次光临我的主页的朋友，请输入你的名字',"");
if (username == null) {
alert('Its ok if you dont want to tell me your name');
username = 'WebSurfer';
} else {
// don't set the username cookie.... because the user refused to tell you.
// they will be prompted next time....
pathname = location.pathname;
myDomain = pathname.substring(0,pathname.lastIndexOf('/')) +'/';
// set expiry date to 1 year from now.
var largeExpDate = new Date ();
largeExpDate.setTime(largeExpDate.getTime() + (365 * 24 * 3600 * 1000));
SetCookie('username',username,largeExpDate,myDomain);
}
}
function getCookieVal (offset) {
var endstr = document.cookie.indexOf (";", offset);
if (endstr == -1)
endstr = document.cookie.length;
return unescape(document.cookie.substring(offset, endstr));
}
function GetCookie (name) {
var arg = name + "=";
var alen = arg.length;
var clen = document.cookie.length;
var i = 0;
while (i < clen) {
var j = i + alen;
if (document.cookie.substring(i, j) == arg)
return getCookieVal (j);
i = document.cookie.indexOf(" ", i) + 1;
if (i == 0)
break;
}
return null;
}

function SetCookie (name, value) {
var argv = SetCookie.arguments;
var argc = SetCookie.arguments.length;
var expires = (argc > 2) ? argv[2] : null;
var path = (argc > 3) ? argv[3] : null;
var domain = (argc > 4) ? argv[4] : null;
var secure = (argc > 5) ? argv[5] : false;
document.cookie = name + "=" + escape (value) +
((expires == null) ? "" : ("; expires=" +
expires.toGMTString())) +
((path == null) ? "" : ("; path=" + path)) +
((domain == null) ? "" : ("; domain=" + domain)) +
((secure == true) ? "; secure" : "");

}
document.write('<p>谢谢您光临我的网页, '+username);
//--></script>

[Linus2000]

定时检索数据库

[hackfan]

一個是用cookie
或者把用戶名對應IP
定期檢索IP
太簡單了