kod:
<script language="javascript"> function addInput() { document.getElementById('text').innerHTML += "<label id='element_4_1' class='description' for='element_4'>Podaj LOGIN do aplikacji: </label>"; document.getElementById('text').innerHTML += "<input id='element_4' name='login' class='element text small' type='text' maxlength='20' value=''/>" } </script>
oraz
<input id="element_1_1" name="rej" class="element radio" type="radio" value="1" onChange="addInput();"/>