(function(n){n.belowthefold=function(t,i){var r=n(window).height()+n(window).scrollTop();return r<=n(t).offset().top-i.threshold};n.abovethetop=function(t,i){var r=n(window).scrollTop();return r>=n(t).offset().top+n(t).height()-i.threshold};n.rightofscreen=function(t,i){var r=n(window).width()+n(window).scrollLeft();return r<=n(t).offset().left-i.threshold};n.leftofscreen=function(t,i){var r=n(window).scrollLeft();return r>=n(t).offset().left+n(t).width()-i.threshold};n.inviewport=function(t,i){return!n.rightofscreen(t,i)&&!n.leftofscreen(t,i)&&!n.belowthefold(t,i)&&!n.abovethetop(t,i)};n.extend(n.expr[":"],{"below-the-fold":function(t){return n.belowthefold(t,{threshold:0})},"above-the-top":function(t){return n.abovethetop(t,{threshold:0})},"left-of-screen":function(t){return n.leftofscreen(t,{threshold:0})},"right-of-screen":function(t){return n.rightofscreen(t,{threshold:0})},"in-viewport":function(t){return n.inviewport(t,{threshold:0})}})})(jQuery)