var state = 'closed';
     function toggleNav (targetLink) {
      var link = targetLink;
      var button = document.getElementById('subnav_toggle_link');
      var columnStructure = document.getElementById('columnStructure');
      var subnav_open = document.getElementById('subnav_open');

      if (state=='closed') {
          button.className='subnav_close';
           columnStructure.className='columns2_navOpen';
           subnav_open.style.display = 'block';
           link.innerHTML = 'CLOSE';
           state = 'open';
      } else {
          button.className='subnav_more';
           columnStructure.className='columns2';
           subnav_open.style.display = 'none';
           link.innerHTML = 'MORE';
           state = 'closed';
      }
     }

     function toggleSearch(toggleState) {
           var fieldState = toggleState;
           var button = document.getElementById('subnav_toggle_link');
           var textField = document.getElementById('search_input');

           if (fieldState=='closed') {
                button.style.display = 'none';
                textField.className='search_input_open';
           } else {
                button.style.display = 'inline';
                textField.className='search_input_closed';
           }
     }