AnimationFrame can be used to do tasks.

AnimationFrame.js

var frame_func = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(func) {
	window.setTimeout(func, 1000 / 60);
};
//帧动画，做定时任务
//动画循环
if (!window.requestAnimationFrame) {
window.requestAnimationFrame = (window.webkitRequestAnimationFrame ||
                              window.mozRequestAnimationFrame ||
                              window.msRequestAnimationFrame ||
                              window.oRequestAnimationFrame ||
                              function (callback) {
                                return window.setTimeout(callback, 17 /*~ 1000/60*/);
                              });
}

//动画循环取消
if (!window.cancelAnimationFrame) {
window.cancelAnimationFrame = (window.cancelRequestAnimationFrame ||
                             window.webkitCancelAnimationFrame || window.webkitCancelRequestAnimationFrame ||
                             window.mozCancelAnimationFrame || window.mozCancelRequestAnimationFrame ||
                             window.msCancelAnimationFrame || window.msCancelRequestAnimationFrame ||
                             window.oCancelAnimationFrame || window.oCancelRequestAnimationFrame ||
                             window.clearTimeout);
}