title: What function to use to show 2 images when you pass your mouse over it?
body: <p>I'm trying to make my header looks like this:  <a href="http://wareztuga.ws/index.php" rel="nofollow">http://wareztuga.ws/index.php</a> and i was wondering how they managed to do that when we pass over the home bottum it flashes.</p>
  
  <p>I know we need to have two images for that result but i need the funcion.</p>