js表單序列化判斷空值的實例

<form id="basicInfo" action="EmployeeServlet?flag=addEmployeeInfo" method="post">
 <div class="formbody">
 <div class="formtitle"><span>基本信息</span></div>
 <ul class="forminfo">
 <li>
 <label>員工賬號</label>
 <input id="account" name="account" type="text" class="dfinput" readOnly="true" />
 <i>設置員工姓名和入職時間后，系統自動生成，無法更改</i>
 </li>
 <li>
 <label>員工姓名</label>
 <input name="name" type="text" class="dfinput" id="name" />
 <i>姓名不能為數字</i>
 </li>
 <li>
 <label>密碼</label>
 <input name="password" type="password" class="dfinput" id="pwd" placeholder="空值或空白則默認密碼為123456" />
 <i></i>
 </li>
 <li>
 <label>性別</label>
 <cite>
 <input name="gender" type="radio" value="男" checked="checked" />男    
 <input name="gender" type="radio" value="女" />女
 </cite>
 </li>
 <li>
 <label>生日</label>
 <input id="birth" name="birthday" type="text" class="dfinput" placeholder="格式:yyyy-mm-dd"/>
 <i id = "birthTip"></i>
 </li>
 <li>
 <label>手機號碼</label>
 <input id="phone" name="telephone" type="text" class="dfinput" />
 <i id = "phoneTip"></i>
 </li>
 <li>
 <label>郵箱</label>
 <input id="email" name="email" type="text" class="dfinput" />
 <i id = "emailTip"></i>
 </li>
 <li>
 <label>地址</label>
 <input name="address" type="text" class="dfinput" />
 <i id = "addressTip"></i>
 </li>
 <li>
 <label>所屬部門</label>
 <select id="dept" class="dfinput" name="dept">
 
 </select>
 </li>
 <li>
 <label>入職時間</label>
 <input id="entrytime" name="entrytime" type="text" class="dfinput" placeholder="格式:yyyy-mm-dd" />
 <i id = "timeTip"></i>
 </li>
 <li>
 <label>員工狀態</label>
 <select id="empstate" class="dfinput" name="empstate">
 </select>
 </li>
 <li>
 <label>直屬上級</label>
 <input id="superior" name="superior" type="text" class="dfinput" placeholder="直屬上級員工id" />
 <i id = "superTip"></i>
 </li>
 <li>
 <label>職務</label>
 <select id="dutyid" class="dfinput" name="dutyid">
 </select>
 </li>
 <li>
 <label>角色權限</label>
 <select id="authority" class="dfinput" name="authority">
 </select>
 </li>
 <li>
 <label> </label>
 <input id="savebtn" type="submit" class="btn" value="確認保存"/>
 </li>
 </ul>
 </div>
</form>

$('form').submit(function(){
//當密碼為空的時候自動賦值
 var pwd = $('#pwd').val();
 if(pwd==null || pwd == ''){
 $('#pwd').val('123456');
 }
 var data = $('form').serialize();
//表單序列化后返回一個字符串 如：account=123&password=1234&sex=&dept=2
 var array = data.split('&');
//把字符串按&號分隔成數組 得到 {account=123,password=1234,sex=,dept=2} 字符串數組
 for(var i = 0;i < array.length; i++){
 var kwarr = array[i].split('=');
//循環將數組中的每個子元素字符串用=號分隔成數組 {account,123} {sex,} 然后判斷索引為1的子元素是否存在或為‘' 從而達到了表單判空的目的
 if(kwarr[1]===null || kwarr[1] ===''){
 alert('除密碼外不能存在空值');
 return false;
 }
 }
});