Do something after you scroll past a certain element. Maybe do something else when you scroll back above it.

jquery.afterscroll.js

/*!
 * jQuery AfterScroll 1.0
 *
 * Do something once the bottom of an element comes into view,
 * and something when you scroll above it too.
 *
 * (c) 2011 Matt Wiebe http://somadesign.ca/
 * GPL2 / MIT dual-license, just like jQuery
 * http://jquery.org/license/
 *
 */
(function($){
	$.fn.afterScroll = function(after, before) {
		var $win = $(window)
		after = after || $.noop
		before = before || $.noop
		return this.each(function() {
			var t = this,
				self = $(t),
				elOffset = self.offset(),
				elBottomPos = self.outerHeight() + elOffset.top,
				scrolled = false

			$win.scroll(function() {
				// haven't scrolled past yet
				if ( ! scrolled && $win.scrollTop() + $win.height() >= elBottomPos ) {
					after.apply(t)
					scrolled = true
				}
				// have scrolled past yet
				else if ( scrolled && $win.scrollTop() + $win.height() < elBottomPos ) {
					before.apply(t)
					scrolled = false
				}
			}).scroll()
		})
	}
})(jQuery);

This is very nice to use!
I noticed the license is GPL2/MIT (just like jQuery)

jQuery has since changed their license to be only MIT.
Is this also the case with this plugin?