jQuery(document).ready( function($) {
  $('#checkout-form-billing table').wrap('<div class="wrapper"></div>');
  if ( $('#use-shipping-for-billing').length > 0 && $('#use-shipping-for-billing')[0].checked ) {
    $('#checkout-form-billing div.wrapper').hide();
  }
  $('#use-shipping-for-billing').click( function() {
    if ( this.checked ) {
      $('#checkout-form-billing div.wrapper').slideUp(750);
    } else {
      $('#checkout-form-billing div.wrapper').slideDown(750);
    }
  });
});