<div>
$(&quot;#ul_b li:' + setHighLight).addClass('hi<wbr />ghlight');<wbr />
</div>


$("#ul_b li:' + setHighLight).addClass('highlight');

<div>
thanks Leakim, its now working.
</div>


<div>
var third = 2;<br />
$(&quot;#ul_b li:eq(&quot; + third + &quot;)&quot;).addClass('highlight')<wbr />;
</div>


var third = 2;
$("#ul_b li:eq(" + third + ")").addClass('highlight');

<div>
<div class="content wysiwyg-content">
how to set a variable on a jquery filter? This is not working.<br />
<br />
var setHighLight = &quot;last&quot;;<br />
<br />
$(&quot;#ul_b li:(' + setHighLight +')&quot;).addClass('highlight'<wbr />);
</div>
</div>


how to set a variable on a jquery filter? This is not working.

var setHighLight = "last";

$("#ul_b li:(' + setHighLight +')").addClass('highlight');

how to set a variable on a jquery filter?

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

Asynchronous JavaScript and XML (AJAX) is a group of interrelated Web development techniques used on the client-side to create asynchronous Web applications. With AJAX, web applications can send data to and retrieve from a server asynchronously (in the background) without interfering with the display and behavior of the existing page. HTML and CSS can be used in combination to mark up and style information. The Document Object Model (DOM) is accessed with JavaScript to dynamically display and allow interaction with the information presented.