jQuery Easing 动画效果扩展详细讲解

linear，swing，jswing，easeInQuad，easeOutQuad，easeInOutQuad，easeInCubic，
easeOutCubic，easeInOutCubic，easeInQuart，easeOutQuart，easeInOutQuart，
easeInQuint，easeOutQuint，easeInOutQuint，easeInSine，easeOutSine，
easeInOutSine，easeInExpo，easeOutExpo，easeInOutExpo，easeInCirc，
easeOutCirc，easeInOutCirc，easeInElastic，easeOutElastic，easeInOutElastic，
easeInBack，easeOutBack，easeInOutBack，easeInBounce，easeOutBounce，easeInOutBounce