JS+HTML5本地存储Localstorage实现注册登录及验证功能示例

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>

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希望本文所述对大家JavaScript程序设计有所帮助。