asp.netÖнâ¾öÒ³Ãæˢкó×ÖÌåµÈ±ä´óµÄÎÊÌâ

protected void Page_Load(object sender, EventArgs e)
        {           
            if (Request.Cookies["login"] != null)
            {
                this.Button1.Attributes.Add("onclick", "if(!confirm('ȷʵҪ¶©¹ºÂð£¿'))   return   false;");
            }
        }
protected void Button1_Click(object sender, EventArgs e)
        {
                Response.Write("<script>alert('µ±Ç°¹ºÎï³µÖÐ,ûÓÐÉÌÆ·');</script>");                  
                return;
        }
°ÑÉÏÃæµÄ¸ÄΪ:
protected void Button1_Click(object sender, EventArgs e)
        {
             //Page.RegisterStartupScript("ServiceManHistoryButtonClick", "<script>alert('µ±Ç°¹ºÎï³µÖÐ,ûÓÐÉÌÆ·');</script>");
             //»òÏÂÃ涼¿É,ÉÏÃæµÚÒ»¸ö²ÎÊýËæ±ãÆð,²»ÒªÖظ´.
                Response.Write("<script>alert('µ±Ç°¹ºÎï³µÖÐ,ûÓÐÉÌÆ·');</script>");   
                Response.Write(" <script>document.location=document.location; </script>");