title: Add values to a query string in a URL
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/4037909/change-single-variable-value-in-querystring">Change single variable value in querystring</a>  </p>
  </blockquote>
  
  
  
  <p>I'm retrieving the current URL:  </p>
  
  <pre>
  http://example.com/?s=original&fq=category
  </pre>
  
  <p>and now I want to insert an additional argument for the <code>s=</code></p>
  
  <pre><code>s=original+additional&amp;fq=category
  </code></pre>
  
  <p>If anyone knows this off the top of their head it would be greatly appreciated!</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>This is in a PHP WordPress environment. I'm tempted to stick with PHP Regex because I'm not sure how to use jQuery/js</p>