C#后台调用前台js封装方法

<script src="/js/layer.js"></script>
    <script>
        function alertFn(msg) {
            layer.open({
                content: msg ,
                shadeClose: false,
                btn: [‘OK‘],
                yes: function () {
                    location.href = "default.aspx?i=" + Math.random();
                },
            });
        }
</script>