Check atleast one checkbox is selected

[venkatesh seshagiri]

I have got a jsp page in which i have used multibox in a iterator tag(Struts version 1.1). Using this i could achieve dynamic rendering of the checkboxes.

I have three actions in the page. Only one action would submit the check box selections. Other two are used for tabbing and pagination.

I would like to use Struts validator framework to validate atleast one check box is checked when the user clicks on the action which submits checkbox selections.

I am new to validator framework and after reading a bit got confused. i am not sure whether to use 'required' or 'requiredIf' or anyother option. I
Any help or directions to achieve the above said validation would be helpful

Thanks
Venkatesh