title: Increase any position fixed
body: <p>How can I use javascript to increase every single position:fixed in a page by a number of pixels?  </p>
  
  <p>For example:  I have a webpage with several fixed position elements and I insert a toolbar at the top using javascript.  Now that the toolbar takes up 40px of space, all the fixed elements are positioned 40px off.</p>
  
  <p>I need some javascript that I can fire at the same time as introducing the toolbar that will increase all the position fixed by 40px.</p>