jquery - How to set a border or highlight input element when validation fails with javascript? -


i have table generated gridview defined that:

<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="a.rohansen@testemail.com" 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="d.damien@testemail.com" 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="d.chaddick@testemail.com" 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>

when validating email field, want highlight or set border red email text field. when doing in validateemail(btnobj) function

$(btnobj).siblings('input:name').style.bordercolor="red";

i error : "error: syntax error, unrecognized expression: syntax error, unrecognized expression: name".

i able access text field (btnobj).siblings('input:text').val()

what right way that?

thank's

you can change css values jquery following:

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

you select required element type 

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

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