asp.net中解决页面刷新后字体等变大的问题

protected void Page_Load(object sender, EventArgs e)
        {           
            if (Request.Cookies["login"] != null)
            {
                this.Button1.Attributes.Add("onclick", "if(!confirm('确实要订购吗？'))   return   false;");
            }
        }
protected void Button1_Click(object sender, EventArgs e)
        {
                Response.Write("<script>alert('当前购物车中,没有商品');</script>");                  
                return;
        }
把上面的改为:
protected void Button1_Click(object sender, EventArgs e)
        {
             //Page.RegisterStartupScript("ServiceManHistoryButtonClick", "<script>alert('当前购物车中,没有商品');</script>");
             //或下面都可,上面第一个参数随便起,不要重复.
                Response.Write("<script>alert('当前购物车中,没有商品');</script>");   
                Response.Write(" <script>document.location=document.location; </script>");