Calendar 15 & 45 times?!?

[Cancorp]

This, I assume (dangerous I know) should be the code that needs to be tinkered with. I have played with it a bit, but I can only get it to change from showing :15 or :30 or :45 and not all 3. This is taken from "functions_calendar.php" in the includes folder of 3.05.

Can anyone get this to work so that our users can choose from :15 and :30 and :45 past the hour? Ideally, we would love to be able to enter our own custom times and not have to choose an interval from the dropdown box at all, but the :15 incriments are better than what we have now.

TIA for anyone who can help.

// ###################### Start fetch time options #######################
function fetch_time_options($giAH, $use24hour = false)
{
	global $vboptions, $stylevar, $vbphrase;
	static $timearray;

	if (!is_array($timearray))
	{
		$timearray = array();

		if ($use24hour)
		{
			for ($hour = 0; $hour < 24; $hour++)
			{
				for ($mins = 0; $mins <= 30; $mins += 30)
				{
					$hh = str_pad($hour, 2, 0, STR_PAD_LEFT);
					$mm = str_pad($mins, 2, 0, STR_PAD_LEFT);
					$timearray["{$hour}_{$mm}"] = "$hh:$mm";
				}
			}
			$timearray['0_00'] = $vbphrase['midnight'];
			$timearray['12_00'] = $vbphrase['midday'];
		}
		else
		{
			$ampm_array = array(
				'AM' => 'am',
				'PM' => 'pm'
			);
			$hour_array = array(
				12, 1, 2, 3,
				4, 5, 6, 7,
				8, 9, 10, 11
			);
			foreach ($ampm_array AS $AMPM => $ampm)
			{
				foreach ($hour_array AS $hour)
				{
					for ($mins = 0; $mins <= 30; $mins += 30)
					{
						$hh = str_pad($hour, 2, 0, STR_PAD_LEFT);
						$mm = str_pad($mins, 2, 0, STR_PAD_LEFT);
						$timearray["{$hour}_{$mm}_{$AMPM}"] = "$hh:$mm $ampm";
					}
				}
			}
			$timearray['12_00_AM'] = $vbphrase['midnight'];
			$timearray['12_00_PM'] = $vbphrase['midday'];
		}
	}

	if (true OR is_array($giAH))
	{
		switch($giAH[1])
		{
			case '15': $giAH[1] = '00'; break;
			case '45': $giAH[1] = '30'; break;
		}
		if ($use24hour)
		{
			$selectedindex = intval($giAH[3]) . '_' . $giAH[1];
		}
		else
		{
			$selectedindex = intval($giAH[0]) . '_' . $giAH[1] . '_' . $giAH[2];
		}
	}
	else
	{
		$selectedindex = false;
	}

	$output = '';
	foreach ($timearray AS $optionvalue => $optiontitle)
	{
		$optionselected = iif($optionvalue == $selectedindex, HTML_SELECTED, '');
		eval('$output .= "' . fetch_template('option') . '";');
	}

	return $output;
}