Creating an array with quarter hour times There is no need for me to use 50 lines of code here, but how can I populate this array in a loop without using date/time methods.

var timeoptions = ["00:00", "00:15", 
               "00:30", "00:45",
               "01:00", "01:15", 
               "01:30", "01:45",
               "02:00", "02:15", 
               "02:30", "02:45",
               "03:00", "03:15", 
               "03:30", "03:45",
               "04:00", "04:15", 
               "04:30", "04:45",
               "05:00", "05:15", 
               "05:30", "05:45",
               "06:00", "06:15", 
               "06:30", "06:45",
               "07:00", "07:15", 
               "07:30", "07:45",
               "08:00", "08:15", 
               "08:30", "08:45",
               "09:00", "09:15", 
               "09:30", "09:45",
               "10:00", "10:15", 
               "10:30", "10:45",
               "11:00", "11:15", 
               "11:30", "11:45",
               "12:00", "12:15", 
               "12:30", "12:45",
               "13:00", "13:15", 
               "13:30", "13:45",
               "14:00", "14:15", 
               "14:30", "14:45",
               "15:00", "15:15", 
               "15:30", "15:45",
               "16:00", "16:15", 
               "16:30", "16:45",
               "17:00", "17:15", 
               "17:30", "17:45",
               "18:00", "18:15", 
               "18:30", "18:45",
               "19:00", "19:15", 
               "19:30", "19:45",
               "20:00", "20:15", 
               "20:30", "20:45",
               "21:00", "21:15", 
               "21:30", "21:45",
               "22:00", "22:15", 
               "22:30", "22:45",
               "23:00", "23:15", 
               "23:30", "23:45"
                ];
var quarterHours = ["00", "15", "30", "45"];
var times = [];
for(var i = 0; i &lt; 24; i++){
  for(var j = 0; j &lt; 4; j++){
    times.push(i + ":" + quarterHours[j]);
  }
}


That's the really quick way without thinking. There might be better ways, but this is what I come up with in 2 minutes.

After testing, you'll find out that it doesn't have a 0 prefix for hours 1 through 9. They show up as "9:45". You could either add a check for that, like so:

var quarterHours = ["00", "15", "30", "45"];
var times = [];
for(var i = 0; i &lt; 24; i++){
  for(var j = 0; j &lt; 4; j++){
    if(i &lt; 10){
      times.push("0" + i + ":" + quarterHours[j]);
    } else {
      times.push(i + ":" + quarterHours[j]);
    }
  }
}


Some more minor cleanup...

var quarterHours = ["00", "15", "30", "45"];
var times = [];
for(var i = 0; i &lt; 24; i++){
  for(var j = 0; j &lt; 4; j++){
    var time = i + ":" + quarterHours[j];
    if(i &lt; 10){
      time = "0" + time;
    }
    times.push(time);
  }
}


Or declare another array with "00", "01", "02"... "23".

Basically what you end up doing is creating every combination of hours and 15 minutes to recreate that big array of yours.