(function (e) {
	e.fn.appear = function (t, n) {
		var r = e.extend({
			data: undefined,
			one: true,
			accX: 0,
			accY: 0
		}, n);
		return this.each(function () {
			var n = e(this);
			n.appeared = false;
			if (!t) {
				n.trigger("appear", r.data);
				return
			}
			var i = e(window);
			var s = function () {
				if (!n.is(":visible")) {
					n.appeared = false;
					return
				}
				var e = i.scrollLeft();
				var t = i.scrollTop();
				var s = n.offset();
				var o = s.left;
				var u = s.top;
				var a = r.accX;
				var f = r.accY;
				var l = n.height();
				var c = i.height();
				var h = n.width();
				var p = i.width();
				if (u + l + f >= t && u <= t + c + f && o + h + a >= e && o <= e + p + a) {
					if (!n.appeared) n.trigger("appear", r.data)
				} else {
					n.appeared = false
				}
			};
			var o = function () {
				n.appeared = true;
				if (r.one) {
					i.unbind("scroll", s);
					var o = e.inArray(s, e.fn.appear.checks);
					if (o >= 0) e.fn.appear.checks.splice(o, 1)
				}
				t.apply(this, arguments)
			};
			if (r.one) n.one("appear", r.data, o);
			else n.bind("appear", r.data, o);
			i.scroll(s);
			e.fn.appear.checks.push(s);
			s()
		})
	};
	e.extend(e.fn.appear, {
		checks: [],
		timeout: null,
		checkAll: function () {
			var t = e.fn.appear.checks.length;
			if (t > 0)
				while (t--) e.fn.appear.checks[t]()
		},
		run: function () {
			if (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 (t, n) {
		var r = e.fn[n];
		if (r) {
			e.fn[n] = function () {
				var t = r.apply(this, arguments);
				e.fn.appear.run();
				return t
			}
		}
	})
})(jQuery);