On click event of one checkbox try the below script. if(this.rawValue==
1){xfa.host.messageBox("true"); xfa.form.form1.sub.CheckBox2.rawValue =
1;xfa.form.form1.sub.CheckBox3.rawValue = 1; }else{
xfa.form.form1.sub.CheckBox2.rawValue =0
;xfa.form.form1.sub.CheckBox3.rawValue =0;}Regards,Vijay