Vyberte instrument<br>
<form method=GET action="tradebook.php">
	<select name="instrument_code">
		<option value='BS'>BS</option><option value='GS'>GS</option><option value='JPM'>JPM</option><option value='NDX'>NDX</option>	</select>
	<input type=submit value="Show">
</form>
<br><br>