$(function() {		var stickyNavTop = $('#header').offset().top;		var stickyNav = function(){		var scrollTop = $(window).scrollTop();		if (scrollTop > stickyNavTop) { 			$('#header').addClass('container-sticky');			if ($('.header_sticky-fill-up').length == 0) {				$('#header').before('<div class="header_sticky-fill-up" style="height:' + $('#header').height() + 'px;"></div>');			}			} else {				$('#header').removeClass('container-sticky');				$('.header_sticky-fill-up').remove(); 			}		};	stickyNav();	$(window).scroll(function() {		stickyNav();	});	});