Ok., i have answer,
below code if someone need:

<script src="http://code.jquery.com/jquery-latest.js";></script>
  <script>
  $(document).ready(function(){

  $("#pole_a").change(function () {
      var text = $(this).val();
      $("#pole_b").val(text);
    });

  });
  </script>
<form id="f_content" name="f_content">
<input type="text" name="pole_a" id="pole_a" value="nowa wartosc" />
<input type="text" name="pole_b" id="pole_b" value="do podmiany" />
</form>



On 10 Wrz, 20:16, PIT_777 <sacud...@gmail.com> wrote:
> Hi,
> i want to get value from pole_a,
> and next set this to pole_b when i see that value of pole_a was
> change.
> i know how to do it in clean JS,
> but i want to do it in jquery.
> Does anywane know how to do it?
>
> <script type="text/javascript">
> //<![CDATA[
> function cloneIDvalue() {
> document.f_content.pole_b.value = document.f_content.pole_a.value;}
>
> //]]>
> </script>
>
> <form id="f_content" name="f_content">
> <input type="text" name="pole_a" id="pole_a" value="nowa wartosc"
> onChange="cloneIDvalue()" />
> <input type="text" name="pole_b" id="pole_b" value="do podmiany" />
> </form>

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