Parallax-Scroll is a jQuery plugin to create elements with background images that behaves as if their
background-attachment property is between
fixed, similar to the parallax scrolling effect you see on Spotify and is loosely based on Peder Andreas Nielsen’s Parallax ImageScroll.
It makes clever use of
background-size properties instead of CSS3 tranforms. It runs buttery smooth and retains the rubber-band scroll behavior in Safari. Works great on mobile too.