Adding save button to custom tree editpage

EditPage.aspx

<%@ Page Language="C#"  MasterPageFile="../../masterpages/umbracoPage.Master" AutoEventWireup="True" CodeBehind="EditPage.aspx.cs" Inherits="SomeCompany.CustomTrees.EditPage" %>
<%@ Register Namespace="umbraco.uicontrols" Assembly="controls" TagPrefix="umb" %>

<asp:Content ID="Content" ContentPlaceHolderID="body" runat="server">

    <umb:UmbracoPanel ID="Panel1"  runat="server" hasMenu="true" Text="Edit Group">
        <umb:Pane ID="Pane1" runat="server">
            <umb:PropertyPanel ID="PPanel0" runat="server" Text="Name">
                <asp:TextBox ID="Name"  runat="server" MaxLength="150"  CssClass="guiInputText guiInputStandardSize"></asp:TextBox>
            </umb:PropertyPanel>
        </umb:Pane>

    </umb:UmbracoPanel>

</asp:Content>

EditPage.aspx.cs

using System;
using System.Configuration;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using umbraco.BasePages;
using umbraco.IO;

namespace SomeCompany.CustomTrees
{
  public partial class EditPage : BasePage
  {
    private int _groupID;

    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected override void OnInit(EventArgs e)
    {
      base.OnInit(e);
      var idString = HttpContext.Current.Request.QueryString["id"];

      if (!int.TryParse(idString, out _groupID)) return;

      ImageButton save = Panel1.Menu.NewImageButton();
      save.ImageUrl = IOHelper.ResolveUrl(SystemDirectories.Umbraco) + "/images/editor/save.gif";
      save.AlternateText = "Save";
      save.Click += SaveRecord;
    }

    private void SaveRecord(object sender, ImageClickEventArgs e)
    {
		//
    }

  }
}