$.easing.easeOutQuart = function (x, t, b, c, d) {
			return -c * ((t=t/d-1)*t*t*t - 1) + b;
		};
		jQuery(function( $ ){
			$('#screen').serialScroll({
				target:'#sections',
				items:'li', 
				prev:'img.prev',
				next:'img.next',
				axis:'x',
				navigation:'#navigation li a',
				offset:-100, 
				queue:false,
				duration:600,
				force:true, 
				cycle:false,
				jump:true, 
				interval:false,
				constant:true,
				onBefore:function( e, elem, $pane, $items, pos ){
					/**
					 * 'this' is the triggered element 
					 * e is the event object
					 * elem is the element we'll be scrolling to
					 * $pane is the element being scrolled
					 * $items is the items collection at this moment
					 * pos is the position of elem in the collection
					 * if it returns false, the event will be ignored
					 */
					 //those arguments with a $ are jqueryfied, elem isn't.
					e.preventDefault();
					if( this.blur )
						this.blur();
				},
				onAfter:function( elem ){
					//'this' is the element being scrolled ($pane) not jqueryfied
				}
			});
			});