$('#stockists').ready(function() {
  $('#' + $('#state-toggle').children(':first').children().attr('id') + '-container').slideDown('fast');
});

$('#state-toggle').children().children().click(function() {
  $('#state-toggle').children().children().addClass('inactive');
  $(this).toggleClass('inactive');
  $('#stockists').children().slideUp('fast');
  $('#' + $(this).attr('id') + '-container').slideDown('fast');
});