<script>  window.onload = function(){   var oUl = document.getElementById('ul1');   var oUl2 = document.getElementById('ul2');   toShow(oUl);   //每四秒執行一次   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);         }       }     };　　　　　　　//運動框架  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);   }　　　　　　　　//獲取非行間樣式  function getStyle(obj,attr){   if(obj.currentStyle){    return obj.currentStyle[attr];   }   else{    return getComputedStyle(obj,false)[attr];   }  } </script>