질문좀드리겠습니다 채택완료

</p><p><select id="dynamic_select">
  <option value="" selected>select</option>
  <option value="/paymentform.php?ca_id=10<a href='<a href="http://www.google.com" target="_blank" rel="noopener noreferrer">http://www.google.com</a>">Google</option'>">1</option</a>>
  <option value="/paymentform.php?ca_id=20<a href='<a href="http://www.youtube.com" target="_blank" rel="noopener noreferrer">http://www.youtube.com</a>">YouTube</option'>">2</option</a>>
  <option value="/paymentform.php?ca_id=30<a href='<a href="https://www.gurustop.net" target="_blank" rel="noopener noreferrer">https://www.gurustop.net</a>">GuruStop.NET</option'>">3</option</a>>
</select></p><p><script>
    $(function(){
      // bind change event to select
      $('#dynamic_select').on('change', function () {
          var url = $(this).val(); // get selected value
          if (url) { // require a URL
              window.location = url; // redirect
          }
          return false;
      });
    });
</script></p><p>