Menu Link Problem

I created a menu and to do a postback or navigate to a desired url, I have to click the text inside the menu. My menu uses a picture as the background and the text is centered vertically and horizontally. I want to be able to click on any part of the picture to do the postback or navigate to a url.
 
1 <asp:Menu ID="Menu1" runat="server" DynamicEnableDefaultPopOutImage="False"
2 StaticEnableDefaultPopOutImage="false">
3 <DynamicMenuItemStyle CssClass="DynamicMenuItem" />
4 <DynamicHoverStyle CssClass="DynamicHover" />
5 <DynamicMenuStyle CssClass="DynamicMenu" />
...