javascript - javascript验证失败时如何设置边框或突出显示输入元素？

我有一个从GridView生成的表，定义如下：

<div>
<table cellspacing="0" id="MainContent_GridView1" style="border-collapse:collapse;">
    <tr>
        <th scope="col"><a href="javascript:__doPostBack(&#39;ctl00$MainContent$GridView1&#39;,&#39;Sort$CustID&#39;)">Customer ID</a></th><th scope="col"><a href="javascript:__doPostBack(&#39;ctl00$MainContent$GridView1&#39;,&#39;Sort$CustFirstName&#39;)">First Name</a></th><th scope="col"><a href="javascript:__doPostBack(&#39;ctl00$MainContent$GridView1&#39;,&#39;Sort$CustLastName&#39;)">Last Name</a></th><th scope="col"><a href="javascript:__doPostBack(&#39;ctl00$MainContent$GridView1&#39;,&#39;Sort$CustCity&#39;)">City</a></th><th scope="col">Email</th>
    </tr><tr>
        <td>
          <span id="MainContent_GridView1_lblCustID_0">12</span>
        </td><td>
          <span id="MainContent_GridView1_lblFirstName_0">Anders</span>
        </td><td>
          <span id="MainContent_GridView1_lblLastName_0">Rohansen</span>
        </td><td>
         <span id="MainContent_GridView1_lblCity_0">Takoma Park</span>
       </td><td>
         <input name="ctl00$MainContent$GridView1$ctl02$txtEmail" type="text" value="[email protected]" id="MainContent_GridView1_txtEmail_0" />
          <span data-val-controltovalidate="MainContent_GridView1_txtEmail_0" data-val-errormessage="Must enter Email Address" data-val-validationGroup="grpEmail" id="MainContent_GridView1_ctl00_0" data-val="true" data-val-evaluationfunction="RequiredFieldValidatorEvaluateIsValid" data-val-initialvalue="" style="visibility:hidden;">Must enter Email Address</span>
           <input type="submit" name="ctl00$MainContent$GridView1$ctl02$btnUpdate" value="Update Email" onclick="return ValidateEmail(this);WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$MainContent$GridView1$ctl02$btnUpdate&quot;, &quot;&quot;, true, &quot;grpEmail&quot;, &quot;&quot;, false, false))" id="MainContent_GridView1_btnUpdate_0" ButtonType="Button" />

         </td>
    </tr><tr style="background-color:#EEEEEE;">
        <td>
          <span id="MainContent_GridView1_lblCustID_1">8</span>
        </td><td>
          <span id="MainContent_GridView1_lblFirstName_1">Deborah</span>
        </td><td>
          <span id="MainContent_GridView1_lblLastName_1">Damien</span>
        </td><td>
         <span id="MainContent_GridView1_lblCity_1">Fresno</span>
       </td><td>
         <input name="ctl00$MainContent$GridView1$ctl03$txtEmail" type="text" value="[email protected]" id="MainContent_GridView1_txtEmail_1" />
          <span data-val-controltovalidate="MainContent_GridView1_txtEmail_1" data-val-errormessage="Must enter Email Address" data-val-validationGroup="grpEmail" id="MainContent_GridView1_ctl00_1" data-val="true" data-val-evaluationfunction="RequiredFieldValidatorEvaluateIsValid" data-val-initialvalue="" style="visibility:hidden;">Must enter Email Address</span>
           <input type="submit" name="ctl00$MainContent$GridView1$ctl03$btnUpdate" value="Update Email" onclick="return ValidateEmail(this);WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$MainContent$GridView1$ctl03$btnUpdate&quot;, &quot;&quot;, true, &quot;grpEmail&quot;, &quot;&quot;, false, false))" id="MainContent_GridView1_btnUpdate_1" ButtonType="Button" />

         </td>
    </tr><tr>
        <td>
          <span id="MainContent_GridView1_lblCustID_2">7</span>
        </td><td>
          <span id="MainContent_GridView1_lblFirstName_2">Derek</span>
        </td><td>
          <span id="MainContent_GridView1_lblLastName_2">Chaddick</span>
        </td><td>
         <span id="MainContent_GridView1_lblCity_2">Fairfield</span>
       </td><td>
         <input name="ctl00$MainContent$GridView1$ctl04$txtEmail" type="text" value="[email protected]" id="MainContent_GridView1_txtEmail_2" />
          <span data-val-controltovalidate="MainContent_GridView1_txtEmail_2" data-val-errormessage="Must enter Email Address" data-val-validationGroup="grpEmail" id="MainContent_GridView1_ctl00_2" data-val="true" data-val-evaluationfunction="RequiredFieldValidatorEvaluateIsValid" data-val-initialvalue="" style="visibility:hidden;">Must enter Email Address</span>
           <input type="submit" name="ctl00$MainContent$GridView1$ctl04$btnUpdate" value="Update Email" onclick="return ValidateEmail(this);WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$MainContent$GridView1$ctl04$btnUpdate&quot;, &quot;&quot;, true, &quot;grpEmail&quot;, &quot;&quot;, false, false))" id="MainContent_GridView1_btnUpdate_2" ButtonType="Button" />

         </td>
    </tr>
</table>

验证电子邮件字段时，我要突出显示电子邮件文本字段或将其边框设置为红色。在我的ValidateEmail(btnObj)函数中执行此操作时

$(btnObj).siblings('input:name').style.borderColor="red";

我收到一个错误：“错误：语法错误，无法识别的表达式：语法错误，无法识别的表达式：名称”。

我可以通过(btnObj).siblings('input:text').val()访问文本字段

什么是正确的方法？

谢谢

最佳答案

您可以使用jQuery通过以下方式更改CSS值：

.css("border", "1px solid red")

您还可以通过类型轻松选择所需的元素

$(btnObj).siblings('input[type="text"]').css("border", "1px solid red");