I just edited the tag mv_timeMenu on tagSwap. Because copy/paste on tagSwap does something with line endings that makes much code end up all being on one line, I post the routine here too. Simply copy & paste.
/*
Creates a list of time values inside a <select></select>. Example:
<select name="xyz" class="abc" id="def">
[mv_timeMenu(-fromHour=800, -toHour=2300, -minutes=25, -selected=$db_value]
</select>
*/
define_tag('mv_timeMenu', -optional='fromhour', -copy, -optional='tohour', -copy, -optional='minutes', -copy, -optional='selected', -copy, -optional='firstblank', -EncodeNone);
local('result' = '', 'p' = 0, 'z' = 0, 'h' = 0, 'm' = 0, 'y' = 0, 'f' = false);
if(! local_defined('firstblank'));
local('firstblank' = 0);
else(integer(#firstblank) <= 0);
#firstblank = 0;
/if;
#firstblank = integer(#firstblank);
if(! local_defined('fromhour'));
local('fromhour' = 0);
else(integer(#fromhour) <= 0);
#fromhour = 0;
/if;
#fromhour = integer(#fromhour);
if(! local_defined('tohour'));
local('tohour' = 2359);
else(integer(#tohour) <= 0 || integer(#tohour) >= 2400);
#tohour = 2359;
/if;
#tohour = integer(#tohour);
if(! local_defined('minutes'));
local('minutes' = 15);
else(integer(#minutes) <= 0);
#minutes = 15;
/if;
#minutes = integer(#minutes);
if(#firstblank);
#result = '<option value="" ';
if(local_defined('selected'));
if(#selected == '');
#result += ' selected="selected"';
/if;
/if;
#result += '></option>';
/if;
// Calculate correct starting point
#z = #fromhour;
#h = integer(#z / 100); // Take hours-part
#m = #z - (#h * 100); // Take minutes-part
#y = integer(#m / #minutes); // Calculate how many times the frequency fits
// Calculate new minutes-starting-point
if(#m == (#y * #minutes));
#m = #y * #minutes;
else;
#m = (#y + 1) * #minutes;
/if;
#y = integer(#m / 60); // Calculate how many hours minutes-starting-point contains
#h += #y; // Add those hours to the hours-part
#m -= (#y * 60); // Subtract the hours from minutes-starting-point
#z = (#h * 100) + #m; // Construct new time
#p = 0;
#f = false;
while(#z <= #tohour);
#result += '<option value="' + mv_fmtnum(#z, '####', 'R') + '" ';
if(local_defined('selected'));
if(!#f && #selected != '' && #selected >= #p && #selected <= #z);
#result += ' selected="selected"';
#f = true;
/if;
/if;
#result += '>' + mv_fmtnum(#z, '##:##', 'R') + '</option>';
#p = #z; // Save previous time
#h = integer(#z / 100); // Take hours-part
#m = #z - (#h * 100); // Take minutes-part
#m += #minutes; // Add interval to the minutes to get total-minutes
#y = integer(#m / 60); // Calculate how many hours total-minutes contains
#h += #y; // Add those hours to the hours-part
#m -= (#y * 60); // Subtract the hours from total-minutes
#z = (#h * 100) + #m; // Construct new time
/while;
return(#result);
/define_tag;
