if (FileUpload1.HasFile)
        {
            string filetype = FileUpload1.PostedFile.ContentType;
            if (filetype == "image/bmp" || filetype == "image/gif" || filetype == "image/pjpeg")
            {
                string filename = FileUpload1.PostedFile.FileName;
                string fileext = System.IO.Path.GetExtension(filename);
                string newfilename = DateTime.Now.ToString("yyyyMMddhhmmss") + fileext;
                string path = HttpContext.Current.Server.MapPath("../Image/");
                string savefilename = path + newfilename;
                try
                {
                    FileUpload1.SaveAs(savefilename);
                    Response.Write("<script>alert('上傳成功!')</script>");
                }
                catch(Exception ex)
                {
                    string message = "新增失敗，原因：" + ex.Message;
                    Response.Write("<script>alert('" + message + "')</script>");
                }
            }
            else
            {
                Response.Write("<script>alert('格式錯誤!')</script>");
            }
        }
        else
        {
            Response.Write("<script>alert('檔名不能為空')</script>");
        }