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>