Select Course Course A Course B Select Month January February ........ November December Select Year 2009 2008 ........ 2003 2002 #### my $profile = { optional => [qw( f_course f_month f_year )], required => [qw( f_a, f_b )], dependencies => { # If f_course is entered, make f_month and f_year required # Or if f_month is entered, make f_course and f_year required # Or if f_year is entered, make f_course and f_month required }, };