/*!
 * Lazy Load - jQuery plugin for lazy loading images
 *
 * Copyright (c) 2007-2015 Mika Tuupola
 *
 * Licensed under the MIT license:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Project home:
 *   http://www.appelsiini.net/projects/lazyload
 *
 * Version:  1.9.7
 *
 */
(function(factory){'use strict';if(typeof define==='function'&&define.amd){define(['jquery'],factory);}else{factory(window.jQuery);}}(function($){'use strict';var $window=$(window);$.fn.lazyload=function(options){var elements=this;var $container;var settings={threshold:0,failure_limit:0,event:"scroll",effect:"show",container:window,data_attribute:"src",data_srcset:"srcset",skip_invisible:false,appear:null,load:null,placeholder:"data:image/gif;base64,R0lGODlhAQABAIAAAPT09P///yH5BAEAAAEALAAAAAABAAEAAAICRAEAOw=="};function update(){var counter=0;elements.each(function(){var $this=$(this);if(settings.skip_invisible&&!$this.is(":visible")){return;}
if($.abovethetop(this,settings)||$.leftofbegin(this,settings)){}else if(!$.belowthefold(this,settings)&&!$.rightoffold(this,settings)){$this.trigger("appear");counter=0;}else{if(++counter>settings.failure_limit){return false;}}});}
if(options){if(undefined!==options.failurelimit){options.failure_limit=options.failurelimit;delete options.failurelimit;}
if(undefined!==options.effectspeed){options.effect_speed=options.effectspeed;delete options.effectspeed;}
$.extend(settings,options);}
$container=(settings.container===undefined||settings.container===window)?$window:$(settings.container);if(0===settings.event.indexOf("scroll")){$container.bind(settings.event,function(){return update();});}
this.each(function(){var self=this;var $self=$(self);self.loaded=false;if($self.is("img")){$self.attr("src",settings.placeholder);if($self.attr("width"))
$self.css("height",$self.width()*$self.attr("height")/$self.attr("width")+"px");}
$self.one("appear",function(){if(!this.loaded){if(settings.appear){var elements_left=elements.length;settings.appear.call(self,elements_left,settings);}
$("<img />").bind("load",function(){var original=$self.attr("data-"+settings.data_attribute),srcset=$self.attr("data-"+settings.data_srcset);$self.hide();if($self.is("img")){$self.attr("src",original);if(srcset){$self.attr("srcset",srcset);}}else{$self.css("background-image","url('"+original+"')");}
$self[settings.effect](settings.effect_speed);self.loaded=true;var temp=$.grep(elements,function(element){return!element.loaded;});elements=$(temp);$self.addClass("porto-lazyload-loaded");$self.css("height","");if(settings.load){var elements_left=elements.length;settings.load.call(self,elements_left,settings);}}).attr("src",$self.attr("data-"+settings.data_attribute));}});if(0!==settings.event.indexOf("scroll")){$self.bind(settings.event,function(){if(!self.loaded){$self.trigger("appear");}});}
if($self.is(":hidden")&&!self.loaded){$self.trigger("appear");}});$window.bind("resize",function(){update();});if((/(?:iphone|ipod|ipad).*os 5/gi).test(navigator.appVersion)){$window.bind("pageshow",function(event){if(event.originalEvent&&event.originalEvent.persisted){elements.each(function(){$(this).trigger("appear");});}});}
$(document).ready(function(){update();});return this;};$.belowthefold=function(element,settings){var fold;if(settings.container===undefined||settings.container===window){fold=(window.innerHeight?window.innerHeight:$window.height())+$window.scrollTop();}else{fold=$(settings.container).offset().top+$(settings.container).height();}
return fold<=$(element).offset().top-settings.threshold;};$.rightoffold=function(element,settings){var fold;if(settings.container===undefined||settings.container===window){fold=$window.width()+$window.scrollLeft();}else{fold=$(settings.container).offset().left+$(settings.container).width();}
return fold<=$(element).offset().left-settings.threshold;};$.abovethetop=function(element,settings){var fold;if(settings.container===undefined||settings.container===window){fold=$window.scrollTop();}else{fold=$(settings.container).offset().top;}
return fold>=$(element).offset().top+settings.threshold+$(element).height();};$.leftofbegin=function(element,settings){var fold;if(settings.container===undefined||settings.container===window){fold=$window.scrollLeft();}else{fold=$(settings.container).offset().left;}
return fold>=$(element).offset().left+settings.threshold+$(element).width();};$.inviewport=function(element,settings){return!$.rightoffold(element,settings)&&!$.leftofbegin(element,settings)&&!$.belowthefold(element,settings)&&!$.abovethetop(element,settings);};$.extend($.expr[":"],{"below-the-fold":function(a){return $.belowthefold(a,{threshold:0});},"above-the-top":function(a){return!$.belowthefold(a,{threshold:0});},"right-of-screen":function(a){return $.rightoffold(a,{threshold:0});},"left-of-screen":function(a){return!$.rightoffold(a,{threshold:0});},"in-viewport":function(a){return $.inviewport(a,{threshold:0});},"above-the-fold":function(a){return!$.belowthefold(a,{threshold:0});},"right-of-fold":function(a){return $.rightoffold(a,{threshold:0});},"left-of-fold":function(a){return!$.rightoffold(a,{threshold:0});}});}));