jquery add class only if exists text
<p>this one is a bit complicated ?<br>
i have a bunch of class ".product-grid .item-box "</p>

<p>and i want to add a class <strong>only</strong> for those who as  the text exists  "NEWprod" in the description 
the description  class name is ".product-grid .product-item .description"</p>

<p>any why to do it with jquery? </p>

<p>i tried </p>

<pre><code>$(document).ready(function () {

if ($(' div.description:contains("חדש1")').length &gt; 0) {
    $(".product-grid .item-box").addClass("newprod");
}

}); 
</code></pre>
