//绑定点击弹出层外面隐藏下拉

$(document).bind("click",function(e){
    var target = $(e.target).parent().parent();
    if(target.closest(".layui-treeselect").length == 0){
        var selTarget = $("#pidSelect").next();
        selTarget.addClass("layui-unselect");
        selTarget.removeClass("layui-drops-selected");
    }
  });