<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<body>
<form action="handler.php">
<select name="select" size="3" multiple>
<option selected value="s1">Чебурашка</option>
<option value="s2">Крокодил Гена</option>
<option value="s3">Шапокляк</option>
<option value="s4">Крыса Лариса</option>
</select>
<input type="submit" value="Отправить">
</form>
</body>
</html>