I have coded a simpel jQuery addIn/plug-in which will bind the checked status from checkboxes to others. Lets say that you have a rule saying that:

If people choose football clubs in London area they should automatically get Arsenal, Chelsea, Fulham, QPR, Tottenham Hotspur and so on…

Then the code might look like this:

jQuery(‘#london’).reflectStatusOn(‘#Arsenal, #Chelsea, #Fulham, #QPR, #TottenhamHotspur’);

You may download and see example of use on my code area:

http://code.netsi.dk/jquery.reflectStatusOn/default.html