/**
 * jQuery.fullBg
 * Version 1.0
 * Copyright (c) 2010 c.bavota - http://bavotasan.com
 * Dual licensed under MIT and GPL.
 * Date: 02/23/2010
**/
(function($) {
	$.fn.fullBg = function(){
		var bgImg = $(this);
		
		bgImg.addClass('fullBg');
		
		function resizeImg() {
	 		var imgwidth = bgImg.width();
			var imgheight = bgImg.height();
			var winwidth = $(window).width();
			var winheight = $(window).height();
			var widthratio = winwidth / imgwidth;
			var heightratio = winheight / imgheight;
			var widthdiff = heightratio * imgwidth;
			var heightdiff = widthratio * imgheight;
			var topPos = -(heightdiff-winheight) /2;
			var leftPos = -(widthdiff-winwidth) /2;
			if(heightdiff>winheight) {
	 			bgImg.css({
					width: winwidth+'px',
					height: heightdiff+'px',
					left:"0px",
					top:topPos+"px"
				});
			}
			else {
				bgImg.css({
					width: widthdiff+'px',
					height: winheight+'px',
					left:leftPos+"px",
					top:"0px"
				});		
			}
		} 
		resizeImg();
		$(window).resize(function() {
			resizeImg();
		}); 
	};
})(jQuery)