title: How do I align a "box" to the middle of the screen?
body: <p>I'm looking for a style which aligns the white box in <a href="http://jsfiddle.net/7AUy7/" rel="nofollow">this fiddle</a> to the center of the screen.</p>
  
  <p>I thought I could use text-align-middle in an outer div-element.
  But unfortunately it doesn't work.</p>
  
  <p>I've been trying for hours now and hope you can help me.</p>
  
  <p>Thank you in advance.</p>