title: How can I react when a user touches an HTML element on an iPhone?
body: <p>I'm displaying some HTML content in my iPhone app using a UIWebView.  I have an image link, and I want it to change when the user touches it - at the moment the user puts a finger on the screen, rather than waiting until they lift their finger back off.</p>
  
  <p>What CSS or JavaScript concept could accomplish this?  I've looked at the <code>hover</code> and <code>active</code> states in CSS, but they don't seem to be what I'm after: <code>hover</code> relates to touch-up rather than touch-down, while <code>active</code> seems to have no effect at all.</p>