(function(a){a.fn.lazyload=function(b){var c={threshold:0,failure_limit:0,event:"scroll",effect:"show",container:window,skip_invisible:!0};b&&(null!==b.failurelimit&&(b.failure_limit=b.failurelimit,delete b.failurelimit),a.extend(c,b));var d=this;return 0==c.event.indexOf("scroll")&&a(c.container).bind(c.event,function(b){var e=0;d.each(function(){if(c.skip_invisible&&!a(this).is(":visible"))return;if(!a.abovethetop(this,c)&&!a.leftofbegin(this,c))if(!a.belowthefold(this,c)&&!a.rightoffold(this,c))a(this).trigger("appear");else if(++e>c.failure_limit)return!1});var f=a.grep(d,function(a){return!a.loaded});d=a(f)}),this.each(function(){var b=this;b.loaded=!1,a(b).one("appear",function(){this.loaded||a("<img />").bind("load",function(){a(b).hide().attr("src",a(b).data("original"))[c.effect](c.effectspeed),b.loaded=!0}).attr("src",a(b).data("original"))}),0!=c.event.indexOf("scroll")&&a(b).bind(c.event,function(c){b.loaded||a(b).trigger("appear")})}),a(c.container).trigger(c.event),this},a.belowthefold=function(b,c){if(c.container===undefined||c.container===window)var d=a(window).height()+a(window).scrollTop();else var d=a(c.container).offset().top+a(c.container).height();return d<=a(b).offset().top-c.threshold},a.rightoffold=function(b,c){if(c.container===undefined||c.container===window)var d=a(window).width()+a(window).scrollLeft();else var d=a(c.container).offset().left+a(c.container).width();return d<=a(b).offset().left-c.threshold},a.abovethetop=function(b,c){if(c.container===undefined||c.container===window)var d=a(window).scrollTop();else var d=a(c.container).offset().top;return d>=a(b).offset().top+c.threshold+a(b).height()},a.leftofbegin=function(b,c){if(c.container===undefined||c.container===window)var d=a(window).scrollLeft();else var d=a(c.container).offset().left;return d>=a(b).offset().left+c.threshold+a(b).width()},a.extend(a.expr[":"],{"below-the-fold":function(b){return a.belowthefold(b,{threshold:0,container:window})},"above-the-fold":function(b){return!a.belowthefold(b,{threshold:0,container:window})},"right-of-fold":function(b){return a.rightoffold(b,{threshold:0,container:window})},"left-of-fold":function(b){return!a.rightoffold(b,{threshold:0,container:window})}})})(jQuery)