-- Create the image map (See tutorial above)
-- Assign links to each area. With PHP, you can easily pass the seat x & y coordinates through the URL and from that decide what seat they want.
-- Grab coordinates from URL
-- Run a switch to find the seat
-- Display booking page
ImageMap Tutorial
Basically, you would have this:
<img src="seats.jpg" ISMAP usemap="#SEAT_MAP" />
<map name="SEAT_MAP">
<area shape="rect" coords="point1,point2,point3,point4" href="somepage.php?coords=point1,point2,point3,point4">
<area shape="rect" coords="point1,point2,point3,point4" href="somepage.php?coords=point1,point2,point3,point4">
<area shape="rect" coords="point1,point2,point3,point4" href="somepage.php?coords=point1,point2,point3,point4">
<area shape="rect" coords="point1,point2,point3,point4" href="somepage.php?coords=point1,point2,point3,point4">
</map>
Then, in your PHP page, either explode (or don't) the coords value, and then run a switch to display the proper seat.
~Brett