原生js记住密码

<!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" />
<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("用户名："+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("你选择了记住密码，我们将记住你的密码："+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>

posted @ 2014-11-14 13:53  豫见世家公子  阅读(1160)  评论(0)  编辑  收藏  举报