Angular sticky footer controller -todo- make a directive, hook this to a service or directly to some controller.

sticky-footer.js

		.controller("ScrollController", function($scope, $window)
		{
			var $footer = angular.element( document.getElementById('footer') ),
			    $site   = angular.element( document.getElementById('site') );

			$scope.positionFooter = function() 
			{

				var footerHeight = $footer.height(),
				    siteHeight 	 = $site.height(),
				    footerTop 	 = (angular.element($window).scrollTop()+angular.element($window).height()-footerHeight);

				if ( footerTop > siteHeight) {
				    
				    $footer.addClass('sticky');
				    
				} else {
				    
				    $footer.removeClass('sticky');
				    
				}

			};

			angular.element($window)
				.scroll($scope.positionFooter)
				.resize($scope.positionFooter);

		});