(function(){
  // touch事件, 左滑屏事件.part3->part2转场 (回场)
  var part3=document.querySelector(".part3");
  part3.addEventListener("touchstart",function(ev){
    var startClientX=null,startClientY=null,
    endClientX=null,endClientY=null;
    startClientX=ev.touches[0].clientX;
    startClientY=ev.touches[0].clientY;
    part3.addEventListener("touchend",function(eve){
      // console.log(ev);
      endClientX=eve.changedTouches[0].pageX;
      endClientY=eve.changedTouches[0].pageY;
      var xdis = endClientX - startClientX;
      var ydis = endClientY - startClientY;
      // xdis <0 ->左移  // xdis >0 ->右移
      // console.log("xdis = "+xdis);
      //几个条件限制来控制 ->确定是左滑
      if (xdis<0 && Math.abs(xdis)>50 &&Math.abs(xdis)>Math.abs(ydis) ) {
        console.log("startClientX = "+startClientX);
        console.log("startClientY= "+startClientY);
        console.log("endClientX= "+endClientX);
        console.log("endClientY= "+endClientY);
        console.log("xdis = "+xdis);
        //part3 退场
        $(".registerDiv, .part3-login").animateCss("bounceOutRight");
        $(".part3").fadeOut(1200);
        //part2 进场
        $(".part2").fadeIn(500);
        $(".vedioPart, .JionDriverBtnIcon , .JionDriverBtn").show();
        $(".vedioPart, .JionDriverBtnIcon , .JionDriverBtn").animateCss("bounceInLeft");
        console.log("<--------");
      };
      startClientX=null;
      startClientY=null;
      endClientX=null;
      endClientY=null;
    },false);//touchend Event
  },false);//touchstart Event
})();