title: Button link doesn't work in Firefox, IE
body: <p>I have  links inside of  that work fine in Chrome, but not IE or Firefox. Nothing happens if you click on them. I've messed with the CSS (z-index included), but am out of ideas. This is XHTML coming out of Drupal.</p>
  
  <p>The html looks like this:</p>
  
  <pre><code>&lt;div class="product-display-block-link"&gt;
    &lt;button&gt;
      &lt;a href="/checkout/outfield-banner/1"&gt;Add to cart&lt;/a&gt;
    &lt;/button&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Any suggestions for where I can look?</p>