/**
 * 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)