(function ($) {
	$.fn.jiggle = function (options) {
		settings = $.extend ({
				speed: 150,
				distance: 2,
				useModernizr: true
			}, options);
		return this.each (function () {
			var $this = $(this),
				do_jiggle = false,
				random_jump = function () {
					var sign = Math.round (Math.random()),
						number = Math.floor (Math.random() * settings.distance);
					if (sign) return number + 'px';
					return -number + 'px';
				},
				start_jiggle = function () {
					if (!settings.useModernizr && !$('html').hasClass('no-csstransitions')) return;
					var time = settings.speed;
					if (do_jiggle)
					{
						$this.css({position:'relative'})
							.animate({left:random_jump(), top:random_jump()}, time/4)
							.animate({left:random_jump(), top:random_jump()}, time/2)
							.animate({left:random_jump(),  top:random_jump()}, time/4);
						setTimeout (start_jiggle, time);
					}
				},
				stop_jiggle = function () {
					do_jiggle = false;
					$this.stop(true).animate({top:0, left:0}, 200);
				};
			$this.hover (function () {
					do_jiggle = true;
					start_jiggle();
				}, stop_jiggle)
		});
	};
	
	
	
	$.fn.jiggleBackground = function (options) {
		settings = $.extend ({
				speed: 50,
				distance: 2
			}, options);
		return this.each (function () {
			var $this = $(this),
				do_jiggle = false,
				random_jump = function () {
					var sign = Math.round (Math.random()),
						number = Math.floor (Math.random() * settings.distance);
					if (sign) return number + 'px';
					return -number + 'px';
				},
				start_jiggle = function () {
					var time = settings.speed;
					if (do_jiggle)
					{
						$this.css({'backgroundPosition': random_jump() + ' ' + random_jump()});
						setTimeout (start_jiggle, 50);
					}
				},
				stop_jiggle = function () {
					do_jiggle = false;
					$this.css({backgroundPosition: '0 0'});
				};
			$this.hover (function () {
					do_jiggle = true;
					start_jiggle();
				}, stop_jiggle)
		});
	};
})(jQuery);