The easiest way to do it might be with a little bit of Javascript and a hidden field. So, you'll end up with something like this:
<input type=hidden name=post_mycheckbox value=<%if post_mycheckbox%>1<%else%>0<%endif%>>
<input type=checkbox onclick="var c; if (this.checked) { c = 1 } else { c = 0 } document.post.post_mycheckbox.value = c">
Jason Rhinelander
Gossamer Threads
jason@gossamer-threads.com
Code:
<input type=hidden name=post_mycheckbox value=<%if post_mycheckbox%>1<%else%>0<%endif%>>
<input type=checkbox onclick="var c; if (this.checked) { c = 1 } else { c = 0 } document.post.post_mycheckbox.value = c">
Jason Rhinelander
Gossamer Threads
jason@gossamer-threads.com