protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
        {
            Regist mregist = new Regist();
            int mFlag4 = mregist.CheckUserRegist(TextBox1.Text);

            if (mFlag4 == 1)                                              //判断是否存在此用户
            {
                AddFriend mAddFriend = new AddFriend();
                int mAgine = mAddFriend.CheckAddFriendMessage(Session["UserID"].ToString(), TextBox1.Text);
                if (mAgine == 1)                                          //判断是否已为好友
                {

                    Page.ClientScript.RegisterStartupScript(Page.GetType(), "Message", "<script Language='javascript'>alert('该用户已为好友')</script>");

                }
                else
                {
                    int mWork = mAddFriend.AddFriends(Session["UserID"].ToString(), TextBox1.Text);
                    if (mWork == 1)                                       //添加好友
                    {
                        Page.ClientScript.RegisterStartupScript(Page.GetType(), "Message", "<script Language='javascript'>alert('等待对方回应')</script>");
                    }
                }
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(Page.GetType(), "Message", "<script Language='javascript'>alert('您输入的邮箱不存在,请重新输入!')</script>");

            }
        }