记住账号密码（根据输入的账号，密码框自动输入有效密码）

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我是靠谱客的博主热心路人，最近开发中收集的这篇文章主要介绍记住账号密码（根据输入的账号，密码框自动输入有效密码），觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

<!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>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0"/>
	<title>login</title>

<script type="text/javascript">
	window.οnlοad=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" οnblur="GetPwdAndChk()">
		<br>
		密    码：<input type="password" ID="txtPassword">
		
		<br>
		
		<input type="checkbox" ID="chkRememberPwd" />记住密码
		<br>
		<input type="button" OnClick="SetPwdAndChk()" value="进入"/>
		</div>
	</form>
</body>
</html>