-if ( $cgi->param('agentnum') =~ /^(\d+)$/ ) {
- push @where, "cust_main.agentnum = $1";
+# cust_classnum (false laziness w/ elements/cust_main_dayranges.html, elements/cust_pay_or_refund.html, prepaid_income.html, cust_bill_pay.html, cust_bill_pkg.html, cust_bill_pkg_referral.html, cust_credit.html, cust_credit_refund.html, cust_main::Search::search_sql)
+if ( grep { $_ eq 'cust_classnum' } $cgi->param ) {
+ my @classnums = grep /^\d*$/, $cgi->param('cust_classnum');
+ push @where, 'COALESCE( cust_main.classnum, 0) IN ( '.
+ join(',', map { $_ || '0' } @classnums ).
+ ' )'
+ if @classnums;