javascript - Exchange text label to select value -

i have box entitled label "data sprzedaży":

<div class="formfield">         <label for="invoice_invoice_sale_date">data sprzedaży</label>                 <?php draw_date_selects('invoice_sale_date', date('d'), date('m'), date('y'))?>                  <div class="clearer"></div> </div> 

i put there dropdown 3 options.
if choose 1 of 3 options, replace default label.

so first thing need pass option value variable, there can replace text of label option value:

$(function() {      $('select').on('change', function() {  	labeltext = $(this).val(); // value of selected option          $('label').text(labeltext); // pass selection option value label      });  });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>  <div class="formfield">      <label for="invoice_invoice_sale_date">data sprzedaży</label>      <?php draw_date_selects('invoice_sale_date', date('d'), date('m'), date('y'))?>        <div class="clearer"></div>  </div>    <select>    <option value="" disabled selected>select option</option>    <option>option 1</option>    <option>option 2</option>    <option>option 3</option>  </select>