window.requestAnimFrame = (function(){                //浏览器的兼容设置  
              return  window.requestAnimationFrame       || 
                      window.webkitRequestAnimationFrame || 
                      window.mozRequestAnimationFrame    || 
                      window.oRequestAnimationFrame      || 
                      window.msRequestAnimationFrame     || 
                      function(/* function */ callback, /* DOMElement */ element){
                        window.setTimeout(callback, 1000 / 60);     //定义每秒执行60次动画
                      };
            })();
        window.onload = function() {
            var c=document.getElementById("myCanvas");
            var img=new Image();
            var imgList=[];
            var n = 0;
            ctx=c.getContext('2d');
            for(var i=16;i<=220;i++){
                    if(56>=i||i>=84){
                        var src_="/test/images/story/"+i+".jpg"
                        imgList.push(src_);
                    }    
                }
//            var t = setInterval(video,66)

            (function video(){                
                img.src = imgList[n];
                img.onload = function () //确保图片已经加载完毕  
                {  
                    ctx.drawImage(img,0,0,608,1080);
                }
                n++;
//                 if(n>=imgList.length){
//                     clearInterval(t)
//                 }
                window.requestAnimFrame(video);
            })()
        }

设置不了速度也不会停止。。。求解。。,最上面那个1000/60改了不行。。