后台登录弹跳特效【原创】

var oMove=document.querySelectorAll('.move');
        var len=oMove.length;
        var timer=null;
        var timeout=null;
        var speed=3;
        move(len-1);
        function move(index){
            if(index<0){
                clearInterval(timer);
                clearTimeout(timeout);
                return;
            }
            var end=150+(index*60);
            timer=setInterval(function(){
                speed+=3;
                var T=oMove[index].offsetTop+speed;
                if(T>end){
                    T=end;
                    speed*=-1;
                    speed*=0.4;
                }
                oMove[index].style.top=T+'px';
            },20);
            timeout=setTimeout(function () {
                clearInterval(timer);
                index--;
                move(index);
            },900);
        }