title: Flot: Add vertical line to grid and background on its right side
body: <p>I discovered <a href="http://code.google.com/p/flot/" rel="noreferrer">Flot</a> yesterday and I'm curious if I can add a vertical line to my graph and have a different background on the right side of the line.</p>
  
  <p>This is my graph so far: <a href="http://jsfiddle.net/cncvL/1/" rel="noreferrer">http://jsfiddle.net/cncvL/1/</a> <em>(evolved from Flot example)</em></p>
  
  <p>For now I've added an extra line by adding data on the y-axis but that is not a desired solution.</p>