ASP.NET 服务端弹出对话框，提示选择确定or取消

//前台  对话框点击确定执行按钮btnConfirm  逻辑

    <script language="javascript" type="text/javascript">

        function btnConfirm() {
            document.getElementById("btnConfirm").click();//
        }

    </script>

//后台，点击确定调用btnConfirm js函数

 string msg ="请确认是否删除？";
 ClientScript.RegisterStartupScript(typeof(string), "1", "if (confirm('" + msg + "')==true){btnConfirm();}", true);