[%- USE HTML %]
[%- SET var_valid = HTML.escape(name_prefix) _ "cvar_" _ HTML.escape(var.name) _ HTML.escape(name_postfix) _ '_valid' -%]
[%- IF var.partsgroup_filtered %]
<input type="hidden" name="[% var_valid %]" value="[% HTML.escape(var.valid) %]">
[%- ELSE %]
<input type=checkbox name='[% var_valid %]'[% IF var.valid %] checked[% END %]>
[%- END %]