$(function() {
  
  $('#qual_not_sure').show(); 
  
  $('#business_area_select input').click(
    function(eventObject) {
      
      var biz_area_id = $(this).val();      
      var class_name = 'biz_area_' + biz_area_id;
      
      $('.biz_area_limit').each(function() {
        
        var row = $(this);
               
        if(!row.is('.' + class_name)) {
          row.hide(); 
        } else {
          row.show();
        }
        
      });
     
    }
  );

 
});