js讀寫COOKIE實現(xiàn)記住帳號或密碼的代碼(js讀寫COOKIE)

2019-11-21 00:29:24

字體：大中小

供稿：網(wǎng)友

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>js COOKIE 記住帳號或密碼</title> <script language="javascript" type="text/javascript"> 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(fā)客戶端事件 function SetPwdAndChk() { //取用戶名 var usr = document.getElementById('txtUserName').value; alert(usr); //將最后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; alert(pwd); 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(); //當前時間加上兩周的時間 expdate.setTime(expdate.getTime() + 14 * (24 * 60 * 60 * 1000)); SetCookie(id, usr, expdate); } //用戶名失去焦點時調(diào)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l(wèi)ength = 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 onload="onLoginLoaded()"> <form id="form1"> <div> 用戶名:<input type="text" ID="txtUserName" onblur="GetPwdAndChk()"> <input type="password" ID="txtPassword"> 密碼：<input type="checkbox" ID="chkRememberPwd" />記住密碼 <input type="button" OnClick="SetPwdAndChk()" value="進入"/> </div> </form> </body> </html>

[Ctrl+A 全選注:如需引入外部Js需刷新才能執(zhí)行]

測試方法：加入先輸入用戶名jb51密碼為 m.survivalescaperooms.com，選擇記住密碼，然后關(guān)閉后，重新打開頁面，在用戶名里面輸入jb51，則密碼會自動輸入密碼。

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