if (isFrontEnv()) {
  
var advIndex = 0;
var advTime;//切换时长
  $(".adv_list li").removeClass("adv_clk").eq(0).addClass("adv_clk");
//五大优势自动切换
function adv_autopaly(){
  if(advIndex < $(".adv_list li").length-1){
    advIndex++;
  }else{
    advIndex = 0;
  };
                
  $(".join_banner_box .adv_pt").hide().eq(advIndex).fadeIn();
  $(".adv_list li").removeClass("adv_clk").eq(advIndex).addClass("adv_clk");
};

//自动切换时长
 advTime = setInterval("adv_autopaly()",3000);

//鼠标悬浮效果
$(".adv_list li").each(function(i){
  $(this).mouseover(function(){
    if(advIndex == $(this).index()){
      clearInterval(advTime);
    }else{
      clearInterval(advTime);
      advIndex = $(this).index();
      $(".join_banner_box .adv_pt").hide().eq(advIndex).fadeIn();
      $(".adv_list li").removeClass("adv_clk").eq(advIndex).addClass("adv_clk");
    };
   advTime = setInterval("adv_autopaly()",3000);
  });
});
}