(function($){$.belowthefold=function(element,settings){var fold=$(window).height()+$(window).scrollTop();return fold<=$(element).offset().top-settings.threshold;};$.abovethetop=function(element,settings){var top=$(window).scrollTop();return top>=$(element).offset().top+$(element).height()-settings.threshold;};$.rightofscreen=function(element,settings){var fold=$(window).width()+$(window).scrollLeft();return fold<=$(element).offset().left-settings.threshold;};$.leftofscreen=function(element,settings){var left=$(window).scrollLeft();return left>=$(element).offset().left+$(element).width()-settings.threshold;};$.inviewport=function(element,settings){var $element=$(element);var offset=$element.offset();var $window=$(window);var windowTop=$window.scrollTop();var threshold=settings.threshold;if(offset.top-threshold<windowTop){if(offset.top+$element.height()+threshold>=windowTop){}else{return false;}}else{if(offset.top-threshold<=windowTop+$window.height()){}else{return false;}}var windowLeft=$window.scrollLeft();if(offset.left-threshold<windowLeft){if(offset.left+$element.width()+threshold>=windowLeft){}else{return false;}}else{if(offset.left-threshold<=windowLeft+$window.width()){}else{return false;}}return true;};$.extend($.expr[":"],{"below-the-fold":function(a,i,m){return $.belowthefold(a,{threshold:0});},"above-the-top":function(a,i,m){return $.abovethetop(a,{threshold:0});},"left-of-screen":function(a,i,m){return $.leftofscreen(a,{threshold:0});},"right-of-screen":function(a,i,m){return $.rightofscreen(a,{threshold:0});},"in-viewport":function(a,i,m){return $.inviewport(a,{threshold:0});},"out-viewport":function(a,i,m){return !$.inviewport(a,{threshold:0});}});})(jQuery);