<?php if (@$_REQUEST['doGo'])
{ echo '<pre>';
print_r($_REQUEST['day']);
echo '</pre>';
}
?>
<form action="<?php echo $_SERVER['SCRIPT_NAME']; ?>" method='post'> <select name='day' size='7'>
<option value=1>Понедельник</option>
<option value=2>Вторник</option>
<option value=3>Среда</option>
<option value=4>Четверг</option>
<option value=5>Пятница</option>
<option value=6>Суббота</option>
<option value=7>Воскресенье</option>
</select> <input type='submit' name='doGo' value='Go!'>
</form>