Tam olarak ne yapmak istiyorsun?
<form name="form" id="form">
  <select name="jumpMenu" id="jumpMenu" onchange="MM_jumpMenu('parent',this,0)">
    <option>Kopru1</option>
    <option>Kopru2</option>
    <option>Kopru3</option>
    <option>Kopru4</option>
  </select>
  <label>
  <input type="submit" name="Git" id="Git" value="Git" />
  </label>
</form>