$(this).css({
     "width":wpers*wid,
     "height":hpers*hei,
     "opacity":allpers
    });

  $(function(){
  //中心点横坐标
  var dotLeft = ($(".container").width()-$(".dot").width())/2-100;
  //中心点纵坐标
  var dotTop = ($(".container").height()-$(".dot").height())/2-100;
  //椭圆长边
  a = 460;
  //椭圆短边
  b = 120;
  //起始角度
  var stard = 0;
  //每一个BOX对应的角度;
  var avd = 360/$(".container img").length;
  //每一个BOX对应的弧度;
  var ahd = avd*Math.PI/180;
  //运动的速度
  var speed = 2;
  //图片的宽高
  var wid = $(".container img").width();
  var hei = $(".container img").height();
  //总的TOP值
  var totTop = dotTop+100;
  //设置圆的中心点的位置
  $(".dot").css({"left":dotLeft,"top":dotTop});
  //运动函数
  var fun_animat = function(){ 
   speed = speed<360".container img").each(function(index, element){
    var allpers = (Math.cos((ahd*index+ainhd))*b+dotTop)/totTop;
    var wpers = Math.max(0.1,allpers);
    var hpers = Math.max(0.1,allpers);
    $(this).css({
     "left":Math.sin((ahd*index+ainhd))*a+dotLeft,
     "top":Math.cos((ahd*index+ainhd))*b+dotTop,
     "z-index":Math.ceil(allpers*10),
     "width":wpers*wid,
     "height":hpers*hei,
     "opacity":allpers
    });
    });
  }
  //定时调用运动函数
  var setAnimate = setInterval(fun_animat,100);
 })