add mouse over affect to asp.net menu

Question

i have the following code in my asp.net page that dispays 5 menu items as images. is it possible to easily add a tag that would enable a mouse over affect?

 <asp:Menu ID="Menu1" runat="server">
                                                        <Items>
                                                            <asp:MenuItem ImageUrl="~/Images/1.png" PopOutImageUrl="~/Images/1mo.png'" NavigateUrl="~/1.aspx" Target="_self"></asp:MenuItem>
                                                            <asp:MenuItem ImageUrl="~/Images/2.png" PopOutImageUrl="~/Images/2mo.png'" NavigateUrl="~/2.aspx" Target="_self"></asp:MenuItem>
                                                            <asp:MenuItem ImageUrl="~/Images/3.png" PopOutImageUrl="~/Images/3mo.png'" NavigateUrl="~/3.aspx" Target="_self"></asp:MenuItem>
                                                            <asp:MenuItem ImageUrl="~/Images/4.png" PopOutImageUrl="~/Images/4mo.png'" NavigateUrl="~/4.aspx" Target="_self"></asp:MenuItem>
                                                            <asp:MenuItem ImageUrl="~/Images/5.png" PopOutImageUrl="~/Images/5mo.png'" NavigateUrl="~/5.aspx" Target="_self"></asp:MenuItem>
                                                        </Items>
                                                    </asp:Menu>