title: Select all child divs with a certain width and update that width
body: <p>I want to change all child divs(parent div id=product_list) with a width of <code>41%</code> to have a width of <code>31%</code>.</p>
  
  <p>Is there any way in jquery to find the child divs with a width of <code>41%</code>(only under parent div id=product_list) and change the width to <code>31%</code></p>
  
  <p><strong>Note:</strong> i cant set code child div id bocz those are change randomly very time. </p>
  
  <p>this is html code</p>
  
  <pre><code>&lt;div id="product_list" style="float:none;"&gt;
    &lt;div id="row_4fec46be9210e" style="margin-right: 5px; width:31%; float:left;"&gt;
        &lt;div id="row_4fec" style="margin-right: 5px; width:15%; float:left;"&gt;&lt;/div&gt;
        &lt;div id="row_4fec" style="margin-right: 5px; width:16%; float:left;"&gt;&lt;/div&gt;
    &lt;div&gt;
    &lt;div id="row_4fec46be92339" style="margin-right: 5px; width:31%; float:left;"&gt;&lt;/div&gt;
    &lt;div id="row_4fec46be92523" style="margin-right: 5px; width:31%; float:left;"&gt;&lt;/div&gt;
    &lt;div id="row_4fec46be92523" style="margin-right: 5px; width:41%; float:left;"&gt;&lt;/div&gt;
    &lt;div id="row_4fec46be92523" style="margin-right: 5px; width:41%; float:left;"&gt;&lt;/div&gt;
   &lt;/div&gt;
  </code></pre>