jquery.scrollWindowTo.js

((function ($) {
	$.scrollWindowTo = function (pos, duration, cb) {
		if (duration == null) {
			duration = 0;
		}
		if (pos === $(window).scrollTop()) {
			$(window).trigger('scroll');
			if (typeof cb === "function") {
				cb();
			}
			return;
		}
		return $('html, body').animate({
			scrollTop: pos
		}, duration, function () {
			return typeof cb === "function" ? cb() : void 0;
		});
	};
})(jQuery));