Hi apr
That's a neat use of the tag property. Just added to your rep points!
If its OK with you, I'd like to add a link to that webpage from a similar item on my website where I use the tag property to set the visible/hidden, enable/disabled, locked/unlocked state of a group of controls at once
See
http://www.mendipdatasystems.co.uk/set-controls/4594398114
EDIT
Your site would also be a useful addition to this webpage
Useful links. Is that also OK with you?