I have this code which applies a hotspot to an image.
<asp:ImageMap ID="ImageMapDemo" runat="server" BackColor="#FFCCCC" HotSpotMode="PostBack" ImageUrl="~/Images/Grd_Red.png" OnClick="ImageMapDemo_Click">
<asp:CircleHotSpot AlternateText="reader1" HotSpotMode="PostBack" PostBackValue="7230209932" Radius="20" X="143" Y="309" />
<asp:CircleHotSpot AlternateText="reader2" HotSpotMode="PostBack" PostBackValue="72309930" Radius="20" X="729" Y="171" />
</asp:ImageMap>
Hoovering over this produces a change in the cursor but I'd like to see a larger circle appear, I guess this should be achievable using css but I cannot figure out how to achieve it.
Any ideas?