title: Disable a class in a URL
body: <p>I have a Wordpress video blog which I have designed so that when viewing the homepage, the content area is left-aligned with a right-aligned sidebar. If the visitor clicks on to the page of a specific blog post, the sidebar is moved down below the content area and the content area (and the video therein) becomes much larger.</p>
  
  <p>In the header.php, I have a line that reads:</p>
  
  <pre><code>&lt;body&lt;?php if ( is_single() ) {
  echo ' class="widescreen" '; } ?&gt;&gt;
  </code></pre>
  
  <p>And in the style.css</p>
  
  <pre><code>#content {
      float: left;
      width: 660px;
  }
  
  .widescreen #content {
      width: 940px;
  }
  </code></pre>
  
  <p>I wish to, if possible, give my visitors the chance to view the single post page with the smaller video size available on the homepage, if for some reason they prefer it that size, and do not wish to search for that particular post in the archive.</p>
  
  <p>I was wondering if it is possible to provide a link to an alternate version of the page with the 'widescreen' class disabled. Something in the realm of: 'website.com/post&amp;class:widescreen=false', although obviously not that exactly.</p>