Reduce space between contentMain

<%@ Page Language="C#" MasterPageFile="~/main.Master" AutoEventWireup="true" Codebehind="Default.aspx.cs"
    Inherits="CitizensBank.CreditDeliveryDashboard.Default" Title="Admin Home :: Clientdash" %>
<%@ MasterType VirtualPath="~/main.Master" %>	
    <asp:Content ID="ContentMain" ContentPlaceHolderID="cphMaster" runat="server">
 <%--   <div id="CollapsiblePanel" class="CollapsiblePanel">
        <ajaxToolkit:CollapsiblePanelExtender ID="cpeDefault"  runat="server"
            TargetControlID="pnlProductionData" ExpandControlID="pnlCollapsiblePanel" CollapseControlID="pnlCollapsiblePanel"
            CollapsedSize="0" Collapsed="false" AutoCollapse="False" AutoExpand="False" ScrollContents="False"
            ImageControlID="imgCollapsible1" ExpandedImage="~/img/collapse.png" CollapsedImage="~/img/expand.png"
            ExpandDirection="Vertical">
        
        <asp:Panel ID="pnlCollapsiblePanel" runat="server">
        <asp:Label ID="lblDateRange" runat="server" CssClass="lblDateRange">
            Collapsible Panel
            <asp:Image ID="imgCollapsible1" ImageUrl="~/img/collapse.png" Style="margin-right: 5px;"
                runat="server" ImageAlign="AbsMiddle" ToolTip="Click Extend / Collapse" />
        
    </div>
    <div id="PanelContent" class="PanelContent">
        <asp:Panel ID="pnlProductionData" runat="server">
            
        
    </div>--%>
    <%--<div>--%>
    <table width="10%" style="height: 45px">
     <tr align="center">
         <td>
            <a style="text-decoration:underline;" href="client.aspx">CLIENT</a>    <a style="text-decoration:underline;" href="Product.aspx">Product</a>
         </td>
     </tr>
    </table>
    
    <%--</div>--%>