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    // toolkit for checkbox cols
    var CheckTable = new Array();
    [% FOREACH col IN cpac.tc.cols %]
      [% NEXT UNLESS cpac.tm.f.$col.extra('extjs_xtype') == 'checkbox' %]
      CheckTable['[% col %]'] = 1;
    [% END %]
    function isCheck (c) {
        return !! CheckTable[c];
    }