by Chris Coyier
<div id="pumpkin" onclick="alert('Boo!');"></div>
var jackolantern = document.getElementById('pumpkin');
jackolantern.style.color = "orange";
jackolantern.style.backgroundColor = "black";
CSS went as HTML:
content: "Happy Halloween!";
Happy Halloween everyone!
*May or may not contain any actual "CSS" or "Tricks".