本文實例講述了JS+HTML5本地存儲Localstorage實現注冊登錄及驗證功能。分享給大家供大家參考，具體如下：
源碼引用的js、jquery都是在線的，代碼拷到本地就能運行
登錄：
<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>登錄</title> <link 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">登錄</div> </div> <div class="content has-header"> <div class="list"> <label class="item item-input"> <span class="input-label">用戶名：</span> <input id="loginName" type="text"> </label> <label class="item item-input"> <span class="input-label">密碼：</span> <input id="loginPsd" type="password"> </label> </div> <div class="padding"> <button οnclick="login()" class="button button-block button-positive">登錄</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);//獲取localStoragevar k = 0;for(e in arr){if($('#loginName').val()==arr[e].loginName){if($('#loginPsd').val()==arr[e].loginPsd){alert('登錄成功');clear();k = 0;return;}else{alert('密碼錯誤');clear();k = 0;return;}}else{ k = 1;}}if(k==1){alert('用戶名不存在');clear();}}else{alert('用戶名不存在');clear();}}}function clear(){$('#loginName').val('');$("#loginPsd").val('');}function NoKong(){if($('#loginName').val()==""){alert('用戶名不能為空');return false;}else if($('#loginPsd').val()==""){alert('密碼不能為空');return false;}return true;}</script> </body></html>注冊：
<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>注冊</title> <link 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">注冊</div> </div> <div class="content has-header"> <div class="list"> <label class="item item-input"> <span class="input-label">用戶名：</span> <input id="loginName" type="text"> </label> <label class="item item-input"> <span class="input-label">密碼：</span> <input id="loginPsd" type="password"> </label> </div> <div class="padding"> <button οnclick="ZhuCe()" class="button button-block button-positive">注冊</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($('#loginName').val()==arr[e].loginName){ alert('該賬號已被注冊'); clear(); return; } } } var user = {'loginName':$("#loginName").val(),'loginPsd':$("#loginPsd").val()}; arr.push(user); localStorage.user=JSON.stringify(arr); alert('注冊成功'); clear(); } } function clear(){ $('#loginName').val(''); $("#loginPsd").val(''); } function NoKong(){ if($('#loginName').val()==""){ alert('用戶名不能為空'); return false; }else if($('#loginPsd').val()==""){ alert('密碼不能為空'); return false; } return true; } </script> </body></html>
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