網站記住密碼功能

 

創建名爲remember-me.js的JS文件

function onLoginLoaded() {

      if (isPostBack == "False") {

            GetLastUser();

      }

}

function GetLastUser() {

      var id = "49BAC005-7D5B-4231-8CEA-16939BEACD67";

      var usr = GetCookie(id);

      if (usr != null) {

            document.getElementById('txtUserName').value = usr;

      } else {

            document.getElementById('txtUserName').value = "001";

      }

      GetPwdAndChk();

}

//點擊登錄時觸發客戶端事件

function SetPwdAndChk() {

      //取用戶名

      var usr = document.getElementById('txtUserName').value;

      //將最後一個用戶信息寫入到Cookie

      SetLastUser(usr);

      //如果記住密碼選項被選中

      if (document.getElementById('chkRememberPwd').checked == true) {

            //取密碼值

            var pwd = document.getElementById('txtPassword').value;

            var expdate = new Date();

            expdate.setTime(expdate.getTime() + 14 * (24 * 60 * 60 * 1000));

            //將用戶名和密碼寫入到Cookie

            SetCookie(usr, pwd, expdate);

      } else {

            //如果沒有選中記住密碼,則立即過期

            ResetCookie();

      }

}

function SetLastUser(usr) {

      var id = "49BAC005-7D5B-4231-8CEA-16939BEACD67";

      var expdate = new Date();

      //當前時間加上兩週的時間

      expdate.setTime(expdate.getTime() + 14 * (24 * 60 * 60 * 1000));

      SetCookie(id, usr, expdate);

}

//用戶名失去焦點時調用該方法

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));

}

//寫入到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);

}

在頁面中引用<script src="common/scripts/remember-me.js" />JS文件

<input id="txtUserName" class="home_login_name" type="text" value="能助手帳戶地址"  onblur="GetPwdAndChk()" />

<input id="txtPassword" class="home_login_password" type="text" value="密碼" />

<img src="common/p_w_picpaths/login_button.gif" alt="提交"  onclick="SetPwdAndChk()" />

<input id="chkRememberPwd" class="home_checkbox" type="checkbox" value="" />記住我