本文实例讲述了JS+HTML5本地存储Localstorage实现注册登录及验证功能。分享给大家供大家参考，具体如下：
源码引用的js、jquery都是在线的，代码拷到本地就能运行
登录：
<html ng-app="ionicApp">
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
<title>登录</title>
<link href="https://cdn.bootcss.com/ionic/1.3.2/css/ionic.css" rel="external nofollow" rel="external nofollow" rel="stylesheet">
<script src="https://cdn.bootcss.com/ionic/1.3.2/js/ionic.bundle.min.js"></script>
</head>
<body>
<div class="bar bar-header">
<div class="h1 title">登录</div>
</div>
<div class="content has-header">
<div class="list">
<label class="item item-input">
<span class="input-label">用户名：</span>
<input id="loginName" type="text">
</label>
<label class="item item-input">
<span class="input-label">密码：</span>
<input id="loginPsd" type="password">
</label>
</div>
<div class="padding">
<button οnclick="login()" class="button button-block button-positive">登录</button>
</div>
</div>
<script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.9.0.min.js"></script>
<script>function login(){if(NoKong()){if(localStorage.user){arr = eval(localStorage.user);//获取localStoragevar k = 0;for(e in arr){if($('#loginName').val()==arr[e].loginName){if($('#loginPsd').val()==arr[e].loginPsd){alert('登录成功');clear();k = 0;return;}else{alert('密码错误');clear();k = 0;return;}}else{ k = 1;}}if(k==1){alert('用户名不存在');clear();}}else{alert('用户名不存在');clear();}}}function clear(){$('#loginName').val('');$("#loginPsd").val('');}function NoKong(){if($('#loginName').val()==""){alert('用户名不能为空');return false;}else if($('#loginPsd').val()==""){alert('密码不能为空');return false;}return true;}</script> </body></html>
注册：
<html ng-app="ionicApp">
<head>
<meta charset="utf-8">
<meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width">
<title>注册</title>
<link href="https://cdn.bootcss.com/ionic/1.3.2/css/ionic.css" rel="external nofollow" rel="external nofollow" rel="stylesheet">
<script src="https://cdn.bootcss.com/ionic/1.3.2/js/ionic.bundle.min.js"></script>
</head>
<body>
<div class="bar bar-header">
<div class="h1 title">注册</div>
</div>
<div class="content has-header">
<div class="list">
<label class="item item-input">
<span class="input-label">用户名：</span>
<input id="loginName" type="text">
</label>
<label class="item item-input">
<span class="input-label">密码：</span>
<input id="loginPsd" type="password">
</label>
</div>
<div class="padding">
<button οnclick="ZhuCe()" class="button button-block button-positive">注册</button>
</div>
</div>
<script src="http://ajax.aspnetcdn.com/ajax/jquery/jquery-1.9.0.min.js"></script>
<script>
function ZhuCe(){
if(NoKong()){
var arr = [];
if(localStorage.user){
arr = eval(localStorage.user);
for(e in arr){
if($('#loginName').val()==arr[e].loginName){
alert('该账号已被注册');
clear();
return;
}
}
}
var user = {'loginName':$("#loginName").val(),'loginPsd':$("#loginPsd").val()};
arr.push(user);
localStorage.user=JSON.stringify(arr);
alert('注册成功');
clear();
}
}
function clear(){
$('#loginName').val('');
$("#loginPsd").val('');
}
function NoKong(){
if($('#loginName').val()==""){
alert('用户名不能为空');
return false;
}else if($('#loginPsd').val()==""){
alert('密码不能为空');
return false;
}
return true;
}
</script>
</body>
</html>
希望本文所述对大家JavaScript程序设计有所帮助。
