https://symphosize.com/wp-content/themes/cadillac/js/jquery.parallax-1.1.3.js?ver=1.1.3

1/*
2Plugin: jQuery Parallax
3Version 1.1.3
4Author: Ian Lunn
5Twitter: @IanLunn
6Author URL: http://www.ianlunn.co.uk/
7Plugin URL: http://www.ianlunn.co.uk/plugins/jquery-parallax/
8
9Dual licensed under the MIT and GPL licenses:
10http://www.opensource.org/licenses/mit-license.php
11http://www.gnu.org/licenses/gpl.html
12*/
13
14(function( $ ){
15	var $window = $(window);
16	var windowHeight = $window.height();
17
18	$window.resize(function () {
19		windowHeight = $window.height();
20	});
21
22	$.fn.parallax = function(xpos, speedFactor, outerHeight) {
23		var $this = $(this);
24		var getHeight;
25		var firstTop;
26		var paddingTop = 0;
27		
28		//get the starting position of each element to have parallax applied to it	
29		function update (){
30			
31			$this.each(function(){
32								
33				firstTop = $this.offset().top;
34			});
35	
36			if (outerHeight) {
37				getHeight = function(jqo) {
38					return jqo.outerHeight(true);
39				};
40			} else {
41				getHeight = function(jqo) {
42					return jqo.height();
43				};
44			}
45				
46			// setup defaults if arguments aren't specified
47			if (arguments.length < 1 || xpos === null) xpos = "50%";
48			if (arguments.length < 2 || speedFactor === null) speedFactor = 0.5;
49			if (arguments.length < 3 || outerHeight === null) outerHeight = true;
50			
51			// function to be called whenever the window is scrolled or resized
52			
53				var pos = $window.scrollTop();				
54	
55				$this.each(function(){
56					var $element = $(this);
57					var top = $element.offset().top;
58					var height = getHeight($element);
59	
60					// Check if totally above or totally below viewport
61					if (top + height < pos || top > pos + windowHeight) {
62						return;
63					}
64					
65					$this.css('backgroundPosition', xpos + " " + Math.round(((firstTop - pos) * (speedFactor/.55))+0) + "px");
66					
67				});
68		}		
69
70		$window.bind('scroll', update).resize(update);
71		update();
72	};
73})(jQuery);