利用cokie记住密码

待我称王封你为后i 2021-06-24 16:12 448阅读 0赞

<!DOCTYPE HTML>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>js COOKIE 记住帐号或密码</title>
    <script type="text/javascript">
        window.onload=function onLoginLoaded() {
            if (isPostBack == "False") {
                GetLastUser();
            }
        }
         
        function GetLastUser() {
            var id = "49BAC005-7D5B-4231-8CEA-16939BEACD67";//GUID标识符
            var usr = GetCookie(id);
            if (usr != null) {
                document.getElementById('txtUserName').value = usr;
            } else {
                document.getElementById('txtUserName').value = "001";
            }
            GetPwdAndChk();
        }
        //点击登录时触发客户端事件
         
        function SetPwdAndChk() {
            //取用户名
            var usr = document.getElementById('txtUserName').value;
            alert(usr);
            //将最后一个用户信息写入到Cookie
            SetLastUser(usr);
            //如果记住密码选项被选中
            if (document.getElementById('chkRememberPwd').checked == true) {
                //取密码值
                var pwd = document.getElementById('txtPassword').value;
                alert(pwd);
                var expdate = new Date();
                expdate.setTime(expdate.getTime() + 14 * (24 * 60 * 60 * 1000));
                //将用户名和密码写入到Cookie
                SetCookie(usr, pwd, expdate);
            } else {
                //如果没有选中记住密码,则立即过期
                ResetCookie();
            }
        }
         
        function SetLastUser(usr) {
            var id = "49BAC005-7D5B-4231-8CEA-16939BEACD67";
            var expdate = new Date();
            //当前时间加上两周的时间
            expdate.setTime(expdate.getTime() + 14 * (24 * 60 * 60 * 1000));
            SetCookie(id, usr, expdate);
        }
        //用户名失去焦点时调用该方法
         
        function GetPwdAndChk() {
            var usr = document.getElementById('txtUserName').value;
            var pwd = GetCookie(usr);
            if (pwd != null) {
                document.getElementById('chkRememberPwd').checked = true;
                document.getElementById('txtPassword').value = pwd;
            } else {
                document.getElementById('chkRememberPwd').checked = false;
                document.getElementById('txtPassword').value = "";
            }
        }
        //取Cookie的值
         
        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;
                //alert(j);
                if (document.cookie.substring(i, j) == arg) return getCookieVal(j);
                i = document.cookie.indexOf(" ", i) + 1;
                if (i == 0) break;
            }
            return null;
        }
        var isPostBack = "<%= IsPostBack %>";
         
        function getCookieVal(offset) {
            var endstr = document.cookie.indexOf(";", offset);
            if (endstr == -1) endstr = document.cookie.length;
            return unescape(document.cookie.substring(offset, endstr));
        }
        //写入到Cookie
         
        function SetCookie(name, value, expires) {
            var argv = SetCookie.arguments;
            //本例中length = 3
            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" : "");
        }
         
        function ResetCookie() {
            var usr = document.getElementById('txtUserName').value;
            var expdate = new Date();
            SetCookie(usr, null, expdate);
        }
    </script>
    </head>
    <body>
    <form id="form1">
      <div> 用户名:
        <input type="text" ID="txtUserName" onblur="GetPwdAndChk()">
        <input type="password" ID="txtPassword">
        密码：
        <input type="checkbox" ID="chkRememberPwd" />
        记住密码
        <input type="button" OnClick="SetPwdAndChk()" value="进入"/>
      </div>
    </form>
    </body>
    </html>