title: Disable image link on click
body: <p>I have a image that links to a page. This is a process button which can take up to 20 seconds to run.
  I want to prevent the user from pushing it more than once.</p>
  
  <p>How would I write a Javascript that when the button is pushed, it would follow the hyperlink, but the link for the button would disable, and the image would change?</p>