function imageRotater(id){
    var cases = "",
    carnum_su = document.getElementById(id),
    images = carnum_su.getElementsByTagName("img"),
    links = carnum_su.getElementsByTagName("a"),
    dt = carnum_su.getElementsByTagName("dt")[0],
    length = images.length,
    asu = 1,
    aBefore = length;
    for(var i=0;i< length;i++){
      cases += images[i].id + ':"'+images[i].getAttribute("src")+'",'
    }
    images[0].style.cssText = "position:absolute;top:0;left:0;";//修正图片位置错误
    var tip = document.createElement("dd");

    carnum_su.insertBefore(tip,dt.nextSibling);
    if(!+"\v1"){
      tip.style.color = "#369";
      tip.style.filter = "alpha(opacity=67)"
    }else{
      tip.style.cssText += "background: rgba(164, 173, 183, .65);"
    }
    cases = eval("({"+cases.replace(/,$/,"")+"})");
    for(var i=0;i<length;i++){
      links[i].onclick = function(e){
        e =e || window.event;
        var su = this.toString().split("#")[1];
        asu = su.charAt(su.length-1);//☆☆☆☆
        images[0].src = cases[su];
        tip.innerHTML = images[asu -1].getAttribute("alt");
          !+"\v1" ?(e.returnValue = false) :(e.preventDefault());
      }
    }
    var prefix = images[0].id.substr(0,images[0].id.length -1);
    (function(){
      setTimeout(function(){
        if(asu > length){
          asu = 1;
        }
        images[0].src = cases[prefix+asu];
        tip.innerHTML = images[asu -1].getAttribute("alt");
        tip.style.bottom = "-40px";
        links[aBefore-1].className = "";
        links[asu-1].className = "hover";
        aBefore = asu;
        asu++;
        move(tip);
        setTimeout(arguments.callee,1500)
      },1500)
    })()
    var move = function(el){
      var begin = parseFloat(el.style.bottom),
      speed = 1;
      el.bottom = begin;
      (function(){
        setTimeout(function(){
          el.style.bottom = el.bottom + speed + "px";
          el.bottom += speed;
          speed *= 2.5;//下一次移动的距离
          if(el.bottom >= 0){
            el.style.bottom = "0px";
          }else{
            setTimeout(arguments.callee,23);
          }
        },25)
      })()
    }
  }