title: Reset button to default value for input box
body: <p>I have an inputbox where visitors can change the value</p>
  
  <pre><code>&lt;input id="custom_coverage" type="text" value="320" name="custom_coverage"&gt;
  </code></pre>
  
  <p>When they change the value, it makes a calculation on the by another jQuery-script.</p>
  
  <p>How can i add a button or a link next to the input box, so visitors can put it back to the default value?</p>