title: Replace gradient colours if eg ie9 detected or gradient feature not possible
body: <p>I have some buttons that have a gradient on them but i need my website to be ie9 friendly and the buttons just appear white inside. How do I write an alternative colour into my code to fall back on if the gradient fails?</p>
  
  <pre><code>background: linear-gradient(#bed738, #61bc4b);
  border: 1px solid #80af37;
  </code></pre>