https://www.radiosantateresa.it/wp-content/themes/castora/js/lib/jquery.appear.js?ver=7.1.1

1/*
2 * jQuery.appear
3 * http://code.google.com/p/jquery-appear/
4 *
5 * Copyright (c) 2009 Michael Hixson
6 * Licensed under the MIT license (http://www.opensource.org/licenses/mit-license.php)
7*/
8(function($){$.fn.appear=function(f,o){var s=$.extend({one:true},o);return this.each(function(){var t=$(this);t.appeared=false;if(!f){t.trigger('appear',s.data);return;}var w=$(window);var c=function(){if(!t.is(':visible')){t.appeared=false;return;}var a=w.scrollLeft();var b=w.scrollTop();var o=t.offset();var x=o.left;var y=o.top;if(y+t.height()>=b&&y<=b+w.height()&&x+t.width()>=a&&x<=a+w.width()){if(!t.appeared)t.trigger('appear',s.data);}else{t.appeared=false;}};var m=function(){t.appeared=true;if(s.one){w.unbind('scroll',c);var i=$.inArray(c,$.fn.appear.checks);if(i>=0)$.fn.appear.checks.splice(i,1);}f.apply(this,arguments);};if(s.one)t.one('appear',s.data,m);else t.bind('appear',s.data,m);w.scroll(c);$.fn.appear.checks.push(c);(c)();});};$.extend($.fn.appear,{checks:[],timeout:null,checkAll: function() {
9            var length = $.fn.appear.checks.length;
10            if (length > 0) {
11                while (length--) {
12                    try {
13                        ($.fn.appear.checks[length])();
14                    } catch (e) {}
15                }
16            }
17        },run:function(){if($.fn.appear.timeout)clearTimeout($.fn.appear.timeout);$.fn.appear.timeout=setTimeout($.fn.appear.checkAll,20);}});$.each(['append','prepend','after','before','attr','removeAttr','addClass','removeClass','toggleClass','remove','css','show','hide'],function(i,n){var u=$.fn[n];if(u){$.fn[n]=function(){var r=u.apply(this,arguments);$.fn.appear.run();return r;}}});})(jQuery);