Function scroll

js/mui.animation.js:10–21

(duration)

	$.scrollTo = function(scrollTop, duration, callback) {
		duration = duration || 1000;
		var scroll = function(duration) {
			if (duration <= 0) {
				window.scrollTo(0, scrollTop);
				callback && callback();
				return;
			}
			var distaince = scrollTop - window.scrollY;
			setTimeout(function() {
				window.scrollTo(0, window.scrollY + distaince / duration * 10);
				scroll(duration - 10);
			}, 16.7);
		};
		scroll(duration);
	};
	$.animationFrame = function(cb) {