title: How can I change the css class rules using jQuery?
body: <p>Can any one help me please, I have two sections of my question.</p>
  
  <ol>
  <li><p>What I want to do is changing css class rules using jQuery on the fly.</p>
  
  <pre>.classname{color:red; font-size:14px;}</pre>
  
  <p>In example above I have  a class named <code>.classname</code> now using jQuery I want to change the font size only not color with in <code>.classname</code> not by adding css inline.</p></li>
  <li><p>I want to create and save <code>.classname</code> change to a file remember there will be complete stylesheet or no of classnames that will be save in file.</p></li>
  </ol>
  
  <p>How I can do this the easiest and better way?</p>
  
  <p>Thanks!</p>