<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script type="text/javascript">
  function getValue(theId,theMarka) { 
      $("#marka_id").val(theId);
      $("#marka_new").val(theMarka);    
    // alert(theMarka); 
    }
</script>

<select size="1" name="marka" id="marka" onchange="getValue($('#marka').val(),$('#marka option:selected').text());">
<option value="1">Audi</option>
<option value="2">BMW</option>
<option value="3">Mercedes</option>
</select>
value: <input type="text" name="marka_id" size="20" id="marka_id"><br />
text: <input type="text" name="marka_new" size="20" id="marka_new">

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.5.1/jquery.min.js"></script>
<script type="text/javascript">
  function getValue(theId,theMarka) { 
      $("#marka_id").val(theId);
      $("#marka_new").val(theMarka);    
    // alert(theMarka); 
    }
</script>
<select size="1" name="marka" id="marka" onchange="getValue($('#marka').val(),$('#marka option:selected').text());">
<option value="1">Audi</option>
<option value="2">BMW</option>
<option value="3">Mercedes</option>
<option value="1">Renult</option>
<option value="2">Alfa</option>
<option value="3">Kia</option>
</select>
value: <input type="text" name="marka_id" size="20" id="marka_id"><br />
text: <input type="text" name="marka_new" size="20" id="marka_new">