title: Change CSS class in head tag
body: <p>Im adding a css class to head tag like:</p>
  
  <pre><code>$("head").append("&lt;style type='text/css'&gt;.classname{color: gold}&lt;/style&gt;");
  </code></pre>
  
  <p>Now i need to change the color attribute i.e. from gold to green.
  Any solutions for that?</p>
  
  <p>Note: I NEED to do this in head tag. something like </p>
  
  <pre><code>$('.classname').css('color','green');
  </code></pre>
  
  <p>does not fit my requirements.
  Thanks.</p>