jQuery grayscale

converts image(s) to grayscale using html5 canvas
Now also works with css background images

requires jQuery, HTML5 canvas

usage:                   

		$('img').grayscale();
		OR
		$('div.bg-image').grayscale();
		
(c) Josef Richter 2011
licensed under MIT license
(see http://www.opensource.org/licenses/mit-license)