enable the background for any html element, not just for body

When I use vegas, I need to put the background image for a div but not for full screen.

So just change the code.

Now you can pass a jquery selector for backgroundTarget like this:
  $.vegas({
    src: 'http://your.image.url',
    backgroundTarget: '.background'
})

then, the image will just as a background for the element which has a class call "background"