title: how to set visibility for css class with jquery and animate function
body: <p>i want set visibility for <em>right</em> css class with jquery and animate function, so use this code:</p>
  
  <pre><code>$(".right").animate({ "visibility": "hidden" }, "slow");
  </code></pre>
  
  <p>and</p>
  
  <pre><code>$(".right").animate({ visibility: hidden});
  </code></pre>
  
  <p>but this not working.</p>