How I can display Image on mouseover event on asp:linkButton

How I can display Image on mouseover event on asp:linkButton

I am using asp.net framework 3.5 and c# 2.0. I am able to bind data in to gridview.

Actually I want to display Image on mouseover event on asp:linkButton, which is used in grid view

<asp:GridView ID="gvTemplate" runat="server" AllowPaging="True" AutoGenerateColumns="False"

                                            CellPadding="4" ForeColor="#333333" GridLines="None" ShowFooter="True" Width="100%"

                                            OnRowCommand="gvTemplate_RowCommand" OnRowDataBound="RowDataBound" OnPageIndexChanging="gvTemplate_PageIndexChanging">

                                                                                        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />

                                            <Columns>

                                                <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Sr. No">

                                                    <ItemTemplate>

                                                        <%# Container.DataItemIndex + 1 %>

                                                    ItemTemplate>

                                                    <HeaderStyle HorizontalAlign="Left" />

                                                asp:TemplateField>

                                                <asp:TemplateField HeaderText="Template Name" ItemStyle-HorizontalAlign="Left">

                                                    <ItemTemplate>

                                                        <asp:LinkButton ID="lBtTempID" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"tempName") %>'

                                                            CommandName='<%# DataBinder.Eval(Container.DataItem,"tempID") %>' CommandArgument="tempID" onmouseover="javascript:showImage(this.id)"/>

                                                    ItemTemplate>

                                                asp:TemplateField>

                                                <asp:TemplateField HeaderStyle-HorizontalAlign="Left" HeaderText="Template Type">

                                                    <ItemTemplate>

                                                        <asp:Label ID="lbltempType" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"tempType") %>' />

                                                    ItemTemplate>

                                                    <HeaderStyle HorizontalAlign="Left" />

                                                asp:TemplateField>

                                            Columns>

                                            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                                            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />

                                            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />

                                            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                                            <EditRowStyle BackColor="#999999" />

                                            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />

                                        asp:GridView>