convert rollover clickable image to a server control

[DC Gringo]

I have a clickable image that I would like to convert into a server control.
I need to preserve all of its existing front-end functions as well. OnClick
I want to run a Sub on the server side, in particular.

Any suggestions?

<A ONMOUSEOVER="MM_nbGroup('over','TabB','TabB_f2.gif ','TabB_f3.gif',1);"
ONCLICK="MM_nbGroup('down','navbar1','TabB','TabB_ f3.gif',1);"
ONMOUSEOUT="MM_nbGroup('out');" HREF="default.aspx?pageID=shas"><IMG
HEIGHT="31" ALT="Suspected Hazard Areas (SHAs)" SRC="TabB.gif" WIDTH="217"
BORDER="0"
NAME="TabB"></A>

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DC G