print start_html(
                 -title   => $title,
                 -script => <<HEREisAscript,
<!--
function focus_first_field(){document.forms[0].elements[0].focus();}
// -->
HEREisAscript
                 -onload => 'focus_first_field()',
                 ),
    <<HERESanother,
<script type="text/javascript">
<!--
    function toggleEmail(evt) {
// longer script omitted...
    }
// -->
</script>
HERESanother
    'Show Email:',
    radio_group(-id => 'hideEmail',
                -name => 'radioEmail',
                -values => [ qw(Yes No) ],
                -default => 'No',
                -onclick => 'toggleEmail(event)'
                );