title: Fadein Body background Image
body: <p>This may be considered a duplicate but I did trawl through similar questions and try the answers but cannot find a proper answer here or in WEB.
  I have a background Image for the body set by  or by
     t.css('backgroundImage', 'url(' + url + ')');</p>
  
  <p>However I am at a loss as to how to acheive fadeout/fadein effect because the usual techniques will fadein/out the body itself.I only need the image to fadein/out</p>
  
  <p>Any help will be appreciated</p>
  
  <p>thanks</p>