JS记录用户登录次数实现代码

function www_helpor_net(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 www_helpor_net(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 = (2 < argc) ? argv[2] : null;
var path = (3 < argc) ? argv[3] : null;
var domain = (4 < argc) ? argv[4] : null;
var secure = (5 < argc) ? argv[5] : false;
document.cookie = name
+ "="
+ escape(value)
+ ((expires == null) ? "" : ("; expires=" + expires
.toGMTString()))
+ ((path == null) ? "" : ("; path=" + path))
+ ((domain == null) ? "" : ("; domain=" + domain))
+ ((secure == true) ? "; secure" : "");
}
var expdate = new Date();
var visits;
expdate.setTime(expdate.getTime() + (24 * 60 * 60 * 1000 * 365)); //设置COOKIES时间为1年,自己随便设置该时间
if (!(visits = GetCookie("visits"))) {
visits = 0;
}
var oldjessionid = GetCookie("OLDJSESSIONID");
if (!oldjessionid) {
oldjessionid = "111";
}
var newjessionid = GetCookie("JSESSIONID");
if (oldjessionid != newjessionid) {
visits++;
SetCookie("OLDJSESSIONID", newjessionid, expdate, "/", null, false);
SetCookie("visits", visits, expdate, "/", null, false);
}

//以下信息显示可以使用标准的HTML语法,自己随便设置

document.write("你已经光临本页" + "<FONT COLOR=red>" + visits + "</FONT>"+ "次！");

//当登录次数达到三次，就自动调用函数，隐藏弹出框，如果只要记录登录次数，下边代码可以忽略
if (visits > 3) {
setInterval("changeH('down')", 2);
} */