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首页 / 脚本样式 / JavaScript / JavaScript使用cookie实现记住账号密码功能

很多登录功能上都有个“记住密码”的功能,其实无非就是对cookie的读取。
下面展示这个功能的代码,原作者已无法考究。。。。
测试方法:直接输入账号密码,提交后,刷新页面,再输入同样的账号,就可以显示
<!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CookieSetLastUser(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CookieSetCookie(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 = 3var 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>