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File: /storage/v12674/lcacorpold/public_html/wp-content/themes/dp_evolve/js/jquery.parallax.js
/*
 Plugin: jQuery Parallax
 Version 1.1.3
 Author: Ian Lunn
 Twitter: @IanLunn
 Author URL: http://www.ianlunn.co.uk/
 Plugin URL: http://www.ianlunn.co.uk/plugins/jquery-parallax/

 Dual licensed under the MIT and GPL licenses:
 http://www.opensource.org/licenses/mit-license.php
 http://www.gnu.org/licenses/gpl.html
 */

(function( $ ){
	var $window = $(window);
	var windowHeight = $window.height();

	$window.resize(function () {
		windowHeight = $window.height();
	});

	$.fn.parallax = function(xpos, speedFactor, outerHeight) {
		var $this = $(this);
		var getHeight;
		var firstTop;
		var paddingTop = 0;

		//get the starting position of each element to have parallax applied to it
		$this.each(function(){
			firstTop = $this.offset().top;
		});

		if (outerHeight) {
			getHeight = function(jqo) {
				return jqo.outerHeight(true);
			};
		} else {
			getHeight = function(jqo) {
				return jqo.height();
			};
		}

		// setup defaults if arguments aren't specified
		if (arguments.length < 1 || xpos === null) xpos = "50%";
		if (arguments.length < 2 || speedFactor === null) speedFactor = 0.1;
		if (arguments.length < 3 || outerHeight === null) outerHeight = true;

		// function to be called whenever the window is scrolled or resized
		function update(){
			var pos = $window.scrollTop();

			$this.each(function(){
				var $element = $(this);
				var top = $element.offset().top;
				var height = getHeight($element);

				// Check if totally above or totally below viewport
				if (top + height < pos || top > pos + windowHeight) {
					return;
				}

				$this.css('backgroundPosition', xpos + " " + Math.round((firstTop - pos) * speedFactor) + "px");
			});
		}

		$window.bind('scroll', update).resize(update);
		update();
	};
})(jQuery);