100分求个div复杂的层的脚本，谁帮忙画个，脚本是写在.aspx中的

我把我那页面脚本发上来
<body>
    <form id="form1" runat="server">
        <div style="width: 300px; height: 300px">
            <asp:ScriptManager ID="ScriptManager1" runat="server">
            </asp:ScriptManager>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <div id="left" style="width: 220px; height: 250px;">
                        <div onclick="clickMenu('1')" style="cursor: hand" title="点击伸缩列表">
                            请选择公司</div>
                        <div id="1">
                            <asp:TreeView ID="treeCorps" runat="server">
                                <Nodes>
                                    <asp:TreeNode Text="分公司" Value="分公司" Expanded="false"></asp:TreeNode>
                                </Nodes>
                            </asp:TreeView>
                        </div>
                        <div onclick="clickMenu('2')" style="cursor: hand" title="点击伸缩列表">
                            请选择部门</div>
                        <div id="2">
                            <asp:TreeView ID="treeDepart" runat="server">
                                <Nodes>
                                    <asp:TreeNode Text="部门" Value="部门" Expanded="false"></asp:TreeNode>
                                </Nodes>
                            </asp:TreeView>
                        </div>
                        <div>
                            人员查询</div>
                    </div>
                    <div id="right" style="width: 80px; height: 250px;">
                        <asp:GridView ID="gv" runat="server" AutoGenerateColumns="False">
                            <Columns>
                                <asp:TemplateField SortExpression="UserName">
                                    <ItemTemplate>
                                        <a href="#" onclick="SelectLineName(<%#Eval("ID") %>,'<%#Eval("UserName") %>')">
                                            <%#Eval("UserName") %>
                                        </a>
                                    </ItemTemplate>
                                    <ItemStyle HorizontalAlign="Center" />
                                </asp:TemplateField>
                            </Columns>
                        </asp:GridView>
                    </div>
                </ContentTemplate>
            </asp:UpdatePanel>
        </div>
    </form>
</body>