title: HTML5 "time" input interval
body: <p>Maybe i am just not searching properly, but does anyone know of a way to have the time input only increment using the spinner based on a preset interval. So if it is 10 minutes, have the up arrow go +10 mins, if the hour changes it would automatically go + an hour</p>
  
  <p>8:50 - Up arrow hit ends with 9:00 -OR- 8:50 - Down arrow hit ends with 8:40</p>