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Filename : jquery.appear.js
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!function(e){e.fn.appear=function(a,r){var p=e.extend({one:!0},r);return this.each(function(){var r=e(this);if(r.appeared=!1,!a){r.trigger("appear",p.data);return}var n=e(window),t=function(){if(!r.is(":visible")){r.appeared=!1;return}var e=n.scrollLeft(),a=n.scrollTop(),t=r.offset(),i=t.left,f=t.top;f+r.height()>=a&&f<=a+n.height()&&i+r.width()>=e&&i<=e+n.width()?r.appeared||r.trigger("appear",p.data):r.appeared=!1},i=function(){if(r.appeared=!0,p.one){n.unbind("scroll",t);var i=e.inArray(t,e.fn.appear.checks);i>=0&&e.fn.appear.checks.splice(i,1)}a.apply(this,arguments)};p.one?r.one("appear",p.data,i):r.bind("appear",p.data,i),n.scroll(t),e.fn.appear.checks.push(t),t()})},e.extend(e.fn.appear,{checks:[],timeout:null,checkAll:function(){var a=e.fn.appear.checks.length;if(a>0)for(;a--;)e.fn.appear.checks[a]()},run:function(){e.fn.appear.timeout&&clearTimeout(e.fn.appear.timeout),e.fn.appear.timeout=setTimeout(e.fn.appear.checkAll,20)}}),e.each(["append","prepend","after","before","attr","removeAttr","addClass","removeClass","toggleClass","remove","css","show","hide"],function(a,r){var p=e.fn[r];p&&(e.fn[r]=function(){var a=p.apply(this,arguments);return e.fn.appear.run(),a})})}(jQuery);