How to wrap button in updatepanel

Hi,

I have a table with a few dropdownlist controls with autopostack=true and a submit button. When submit button is clicked Gridviews are populated.

However, I don't know how to wrap the buttons in an updatepanel so that the top part of the page where the dropdownlists are isn't refreshed when buttons (cmdsearch and cmdReset) are clicked.

<asp:UpdatePanel ID="upFund" runat="server" UpdateMode="Conditional"><ContentTemplate><asp:DropDownList ID="drpFund" runat="server" Width="160px" AutoPostBack="true"></asp:DropDownList></ContentTemplate><Triggers><asp:AsyncPostBackTrigger ControlID="drpFund" EventName="SelectedIndexChanged"/></Triggers></asp:UpdatePanel><asp:UpdatePanel ID="updatePanelProps" runat="server"><ContentTemplate><table id="tblProps" cellpadding="2" cellspacing="0" runat="server"><tr><td style="width: 130px"><asp:RadioButton ID="chklsCutIsFundNumber" runat="server" AutoPostBack="true" GroupName="grpCriteria"
                                                Text="search by fund number" /></td><td><cc1:ValidateTextBox ID="txtCutFundNumber" runat="server" CompareType="Integer" ></cc1:ValidateTextBox></td></tr><tr><td><asp:RadioButton ID="chklsCutIsFreeText" runat="server" AutoPostBack="true" GroupName="grpCriteria"
                                                Text="Free search" /></td><td><asp:DropDownList ID="drpCutSearchByCategory" runat="server" AutoPostBack="true"    Width="150px"></asp:DropDownList><asp:TextBox ID="txtCutSearch" runat="server" Width="115px" MaxLength="255"></asp:TextBox></td></tr><tr><td><asp:RadioButton ID="chklsCutFundHasProperties" runat="server" AutoPostBack="true"
                                                GroupName="grpCriteria" Text="search by properties" /></td><td></td></tr><tr><td class="style3">
                                          Company</td><td class="style3"><asp:DropDownList ID="drpManagement" Width="350px" runat="server" AutoPostBack="True"> </asp:DropDownList></td></tr><tr><td>
                                           operator</td><td><asp:DropDownList ID="drpOperator" Width="350px" runat="server" AutoPostBack="True"></asp:DropDownList></td></tr><tr><td></td><td></td></tr></table></fieldset></ContentTemplate></asp:UpdatePanel><table><tr><td><asp:Button ID="cmdSearch" runat="server" Text="search" ValidationGroup="vgrp" /><asp:Button ID="cmdReset" runat="server" Text="reset"  CausesValidation="false" /><asp:Label ID="lblErrorMessage" runat="server" ForeColor="Red"></asp:Label></td><td class="style5"></td></tr></table></td></tr>

---3 gridviews each wrapped in each own updatepanel
  <asp:UpdatePanel ID="upCompanies" runat="server" UpdateMode="Conditional"><ContentTemplate><div id="divCompanies" runat="server" class="divScroll"><table><tr><td><asp:GridView ID="grdCompanies">
------</ContentTemplate></asp:UpdatePanel>