The world's easiest sticky top-menu with links that highlight. Just give your nav a class of "topmenu", and your individual sections a class of "section", and link to the ID of the element you want to scroll to.

Sticky top menu with active links.

//Stick the top menu when you scroll
var stickyel = $(".topmenu");
var stickyTop = stickyel.offset().top;
var menuheight = stickyel.height();
var sections = $("div.section");
	
$(window).scroll(function(){   
	var windowTop = $(window).scrollTop(); 
	if (stickyTop < windowTop) {
		$(stickyel).css({"position":"fixed", "top":0});
	}
	else {
		$(stickyel).css({"position":"absolute", "top":""});
	}
	$(sections).each(function(){
		$this = $(this);
		offsetadjust = $this.offset().top - menuheight;
	
		if(offsetadjust < windowTop && windowTop < offsetadjust + $this.height()) {
			$("a[href=#"+$this.attr("id")+"]").addClass("active");
		} else {
			$("a[href=#"+$this.attr("id")+"]").removeClass("active");
		}
	});
});