I've been struggling to find a way to change a button in the header without losing the formatting. I want to change the Delete button with delete icon to a Done button with check icon.

Here's a shortened version of the code:

```
<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.0.1/jquery.mobile-1.0.1.min.css" />
    <script src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
    <script src="http://code.jquery.com/mobile/1.0.1/jquery.mobile-1.0.1.min.js"></script>
    <script type="text/javascript">
    function swapButton() {
      $('#button').attr('data-icon', 'check').text('Done').trigger('create');
      $('#header').trigger('create');
    }
    </script>
  </head>
  <body>
    <div data-role="page">
      <div data-role="header" data-position="fixed" id="header">
        <a data-icon="delete" id="button" onclick="swapButton()">Delete</a>
        <h1>Test Page</h1>
      </div>
      <div data-role="content">
        <p>Click on Delete to get Done button</p>
      </div>
    </div>
  </body>
</html>

```

This changes the text of the button properly but all the formatting disappears.

I've tried using `trigger('create')` on both the button and the header which doesn't work, I've also tried the `.page()` method which I read in an answer elsewhere and I tried `.button()` too.

I can't think of anything else to try.