scroll active item menu + smoosh scroll

scroll-top-menu.html

// Cache selectors
			var lastId,
			    topMenu = $("#top-menu"),
			    topMenuHeight = topMenu.outerHeight()+15,
			    // All list items
			    menuItems = topMenu.find("a"),
			    // Anchors corresponding to menu items
			    scrollItems = menuItems.map(function(){
			      var item = $($(this).attr("href"));
			      if (item.length) { return item; }
			    });

			// Bind click handler to menu items
			// so we can get a fancy scroll animation
			menuItems.click(function(e){
			  var href = $(this).attr("href"),
			      offsetTop = href === "#" ? 0 : $(href).offset().top-topMenuHeight+1;
			  $('html, body').stop().animate({ 
			      scrollTop: offsetTop
			  }, 300);
			  e.preventDefault();
			});

			// Bind to scroll
			$(window).scroll(function(){
			   // Get container scroll position
			   var fromTop = $(this).scrollTop()+topMenuHeight;
			   
			   // Get id of current scroll item
			   var cur = scrollItems.map(function(){
			     if ($(this).offset().top < fromTop)
			       return this;
			   });
			   // Get the id of the current element
			   cur = cur[cur.length-1];
			   var id = cur && cur.length ? cur[0].id : "";
			   
			   if (lastId !== id) {
			       lastId = id;
			       // Set/remove active class
			       menuItems
			         .parent().removeClass("active")
			         .end().filter("[href='#"+id+"']").parent().addClass("active");
			   }                   
			});