Modernizr/Modernizr — pull request #608 by allanlei (2012-06-05 09:57:07+00:00)
Title: Feature Detection - background-position-xy

Test: http://jsfiddle.net/allanlei/R8AYS/

http://snook.ca/archives/html_and_css/background-position-x-y

Tried on:
* Opera 11.64 (Windows)
* Chrome 19.0.1084.52 m (Windows)
* Firefox 12.0 (Windows)
* Safari 5.1.5 (Windows)
* IE 9.0.8112 (Windows)
* IE 8 using IE 9 (Windows) using IE 8 browser mode
* IE 7 using IE 9 (Windows) using IE 7 browser mode
* Chrome 19.0.1084.52 (Linux Mint 11)
* Firefox 12.0 (Linux Mint 11)