Untitled

<head>
<script language="JavaScript">
<!--
 function oblicz() {
--
 }
 // -->
 </script>
 </head>
 <body>
  <div>
   <input type="text" id="pierwsza" value="">
   <select id="dzialanie">
    <option value=""></option>
	<option value="do">+</option>
	<option value="od">-</option>
	<option value="mn">*</option>
 <option value="dz">:</option>
   </select>
   <input type="text" id="druga" value="">
   <input type="button" id="guzik" name="guzik" value="="
 onclick="oblicz();">
   <input type="text" id="wynik" value="">
  </div>
 </body>
 </html>