使用JQuery Validation Plugin进行条件验证

时间:2010-05-19 00:38:31

标签: javascript jquery validation conditional

我有一个简单的html表单,我已经使用JQuery Validation插件添加了验证。我让它适用于需要值的单个字段。我现在需要对其进行扩展,以便如果用户对问题回答“是”,则必须在“详细信息”字段中输入内容,否则“详细信息”字段可以留空。我正在使用单选按钮显示是/否。这是我完整的html表单 - 我不确定从哪里开始:

    <script type="text/javascript" charset="utf-8">
    $.metadata.setType("attr", "validate");
    $(document).ready(function() {
    $("#editRecord").validate();
    });
    </script>

    <style type="text/css"> 
    .block { display: block; }
    form.cmxform label.error { display: none; } 
    </style>

    </head>
    <body>

            <div id="header">
                <h1>
                    Questions</h1>
            </div>
            <div id="content">
                <h1>
                    Questions Page 1
                </h1>
          </div>
    <div id="content">
                <h1>
                </h1>
                <form class="cmxform" method="post" action="editrecord.php"     id="editRecord">
                <input type="hidden" name="-action" value="edit">
                  <h1>
                    Questions                
                  </h1>

          <table width="46%" class="record">
          <tr>
          <td width="21%" valign="top" class="field_name_left"><p>Question 1</p></td>
          <td width="15%" valign="top" class="field_data">
           <label for="Yes">
            <input type="radio" name="Question1" value="Yes" validate = "required:true" /> Yes
            </label>
            <label for="No">
   <input type="radio" name="Question1" value="No" /> No
            </label>
            <label for="Question1" class="error">You must answer this question to proceed</label>
            </td>
          <td width="64%" valign="top" class="field_data"><strong>Details:</strong>
          <textarea id = "Details1" class="where" name="Details1" cols="25" rows="2"></textarea></td>
          </tr>
     <tr>
          <td valign="top" class="field_name_left">Question 2</td>
<td valign="top" class="field_data">
   <label for="Yes">
            <input type="radio" name="Question2" value="Yes" validate = "required:true" /> Yes
            </label>
            <label for="No">
   <input type="radio" name="Question2" value="No" /> No
            </label>
            <label for="Question2" class="error">You must answer this question to proceed</label>
        </td>
     <td valign="top" class="field_data"><strong>Details:</strong>
              <textarea id = "Details2" class="where" name="Details2" cols="25" rows="2"></textarea>           </td>
   </tr>
          <tr class="submit_btn">
                          <td colspan="3">
                                <input type="submit" name="-edit" value="Finish">
                                <input type="reset" name="reset" value="Reset">            </td>
            </tr>
          </table>
      </form>
    </div>
    </body>
    </html>

3 个答案:

答案 0 :(得分:19)

<textarea>个元素上,为dependency expression添加required,例如问题1,请执行以下操作:

validate="required:'input[name=Question1][value=Yes]:checked'"

这表示如果$('input[name=Question1][value=Yes]:checked').length > 0需要该字段,那么如果选中是,则需要:)

You can see a working demo here

答案 1 :(得分:15)

您可以这样做:

$("#editRecord").validate({
    rules: {
        'Details1': {
            required: function() {
                return $('input[name=Question1]').val() == 'yes';
            }
        }
        'Details2': {
            required: function() {
                return $('input[name=Question2]').val() == 'yes';
            }
        }
    }
});

答案 2 :(得分:0)

回应上面提出的Nick Craver的建议回应,我找到了正确的语法:

类=&#34;验证[需要] [名称=问题1] [值=是]:检查&#34;

而不是他发布的内容。

感谢你让我走上正轨!