protected void Page_Load(object sender, EventArgs e)
    {
              Label segname = new Label();
        segname = (Label)Master.FindControl("page");
        segname.Text = "Demo";

        Label slide = new Label();
        slide = (Label)Master.FindControl("sno");
        slide.Text = "Page 340 of 360";

        ImageButton ib = new ImageButton();
        ib = (ImageButton)Master.FindControl("goton");
        ib.Click += new ImageClickEventHandler(ib_Click);

    }

    void ib_Click(object sender, ImageClickEventArgs e)
    {
        Response.Redirect("Page341.aspx");
    }