title: How to set js as background?
body: <p>I'm designing my own website and I want a moving matrix background. I found a moving matrix-js which I put in my index. I can't set the js as a 'background' so my text is placed beneath the js. </p>
  
  <p>Btw the design is made with CSS and XHTML. Do I need to do something with the z-index?</p>
  
  <p>Thanks in advance!</p>
  
  <p><a href="http://smcv4001.stellamariscollege.net/stellan2.0" rel="nofollow">http://smcv4001.stellamariscollege.net/stellan2.0</a></p>