Custom parallax effect

funky-fresh.js

/**
 * Main JS file for Casper behaviours
 */
  $(document).ready(function(){
		var lastScrollTop = 0;
		$(window).scroll(function(event){
			var st = $(this).scrollTop();
				var scrolli = st/1.5;
				scrollicious = $(".cover-image > img").css({"top": scrolli + "px"});
			if (st > lastScrollTop){
				scrollicious;
			} else {
				scrollicious;
			}
			lastScrollTop = st;
		});
	});