title: get CSS rule's percentage value in jQuery
body: <p>Let's say the rule is as follows:</p>
  
  <pre><code>.largeField {
      width: 65%;
  }
  </code></pre>
  
  <p>Is there a way to get '65%' back somehow, and not the pixel value?</p>
  
  <p>Thanks.</p>
  
  <p><strong>EDIT:</strong> Unfortunately using DOM methods is unreliable in my case, as I have a stylesheet which imports other stylesheets, and as a result the <strong>cssRules</strong> parameter ends up with either <em>null</em> or <em>undefined</em> value. </p>
  
  <p>This approach, however, would work in most straightforward cases (one stylesheet, multiple separate stylesheet declarations inside the <em>head</em> tag of the document).</p>