<script>
  window.onload = function(){
   var oUl = document.getElementById('ul1');
   var oUl2 = document.getElementById('ul2');

   toShow(oUl);
   //每四秒执行一次
   setTimeout(function(){
    toShow(oUl2);     
   },4000); 
   function toShow(obj){
    var aDiv = obj.getElementsByTagName('div');
    var iNow = 0;
    var timer = null;
    var bBtn = true;

    setInterval(function(){   
     toChange(); 
    },2000);
    function toChange(){
     timer = setInterval(function(){
      if(iNow==aDiv.length){
       clearInterval(timer);
       iNow = 0;
       bBtn = !bBtn;
      }
      else if(bBtn){
       startMove(aDiv[iNow],{top:0},function(){
        var p = document.getElementsByClassName('p-2');
        for(var i=0; i<p.length;i++){
         p[i].style.background = 'red';
        }
       });
       iNow++;
      }
      else{
       startMove(aDiv[iNow],{top:-30});
       iNow++;
      }     
     },100);     
    }    
   }   
  };
　　　　　　　//运动框架
  function startMove(obj,json,endFn){ 
   clearInterval(obj.timer);  
   obj.timer = setInterval(function(){   
    var bBtn = true;   
    for(var attr in json){    
     var iCur = 0;   
      iCur = parseInt(getStyle(obj,attr)) || 0;
     var iSpeed = (json[attr] - iCur)/8;
      iSpeed = iSpeed >0 ? Math.ceil(iSpeed) : Math.floor(iSpeed);

     if(iCur!=json[attr]){
      bBtn = false;
     }
     obj.style[attr] = iCur + iSpeed + 'px';    
    }   
    if(bBtn){
     clearInterval(obj.timer);
     if(endFn){
      endFn.call(obj);
     }
    }
   },30); 
  }
　　　　　　　　//获取非行间样式
  function getStyle(obj,attr){
   if(obj.currentStyle){
    return obj.currentStyle[attr];
   }
   else{
    return getComputedStyle(obj,false)[attr];
   }
  }
 </script>