layui彈出框confirm自定義樣式

增加skin參數，自定義皮膚樣式。

layer.confirm(content,{btn:btn,
		skin:'hbk-class',
					area: ['500px', '300px'],
					btn1:function(index){
							console.log("點選了我知道了");
							var id = res.data[0].id;
							console.log("id="+id);
							// 更新消息狀态
							$.ajax({
								url:ctx+"sys/msg/readMsg/"+id,
								type:'post',
								dataType:'json',
								success:function(res){
									console.log("更新狀态成功");
									console.log(res);
									layer.close(index);
								},error:function(err){
									console.log("更新狀态失敗");
									console.log(err);
								}
							});
					},btn2:function(){
							console.log("點選了取消");
				},title:title});
           

<style>
    .hbk-class .layui-layer-title{background:red; color:#fff; border: none;}
    .hbk-class .layui-layer-btn .layui-layer-btn0{background:#E12D2E;color:#FFF}
    .hbk-class .layui-lay