layer.msg弹窗倒计时

//layer.msg弹窗倒计时//second : 倒计时时间，单位，秒//content: 弹窗内容，类型；Stringfunction countDown(second,content){    layer.msg(content, {        time : 5000,        shade: 0.6,        success: function(layero,index){            var msg = layero.text();            var i = second;            var timer = null;            var fn = function() {            layero.find(".layui-layer-content").text(msg+' '+i+' ');            if(!i) {                layer.close(index);                clearInterval(timer);            }             i--;            };            timer = setInterval(fn, 1000);            fn();        },            }, function() {            $("#btnSave").removeAttr("disabled");    });}