title: Preload Mouseover Images in Rails
body: <p>I currently have a rollover button implemented in rails as follows:</p>
  
  <pre><code>&lt;%= image_tag("header/home_but.gif", :mouseover =&gt; "header/home_over.gif") %&gt;
  </code></pre>
  
  <p>How can I preload/cache the mouseover image (home_over.gif) so there is no delay when the user moves their mouse over the image?  Thanx.</p>