With ref to the contrib: "Update multiple rows in MySQL with checkboxes" @ www.dmxzone.com/go?17550

First of all thanks for the tutorial - just what I was looking for - there is an error however at (approx) line 59 the script needs: onclick="un_check(this);"
to allow all the checkboxes to be selected/deselected

It took me a while to figure out, so a correction could save some time for future coders.

Apologies if this has already been pointed out.