Don't know how many check boxes you have but I just tested with four. In
the 4th checkbox I used this FormCalc on the click event:if
($.rawValue==1)thenCheckBox1.rawValue="1"CheckBox2.rawValue="1"CheckBox3.rawValue="1"elseCheckBox1.rawValue="0"CheckBox2.rawValue="0"CheckBox3.rawValue="0"endifBy
checking checkbox 4, all are checked. If you uncheck, they all go blank