Sticky Menu

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jQuery Script
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jQuery(document).ready(function(){
	// grab the initial top offset of the navigation 
	var sticky_navigation_offset_top = $('on your div id/class ').offset().top;

	// our function that decides weather the navigation bar should have "fixed" css position or not.
	var sticky_navigation = function(){
	var scroll_top = $(window).scrollTop(); // our current vertical position from the top

	// if we've scrolled more than the navigation, change its position to fixed to stick to top, otherwise change it back to relative
	if (scroll_top > sticky_navigation_offset_top) { 
	  $('on your div id/class').css({ 'position': 'fixed', 'top':0, 'left':0 });
	} else {
	  $('on your div id/class').css({ 'position': 'relative' }); 
	}   
	};

	// run our function on load
	sticky_navigation();

	// and run it again every time you scroll
	jQuery(window).scroll(function() {
	 sticky_navigation();
	});
});


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CSS
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id/class {
  position: relative;
  width: 100%;
  z-index: 99999999;
}