tal:attributes="class python: here.portal_selections.getSelectionInvertModeFor(request.get(\'selection_name\', None)) and \'filter_on\' or \'filter\';"\n
\074a tal:attributes="href python: \'%s%s%s\' % (button_action[\'url\'], \'?\' in button_action[\'url\'] and \'\046amp;\' or \'?\', http_parameters)"\076\n