How to add a time-only masked textbox?

How to add a time-only masked textbox?

I have a contact form for my website here:

http://astrovighnesh.com/website/index.php?pg=contact

I am looking to see if in the time of birth text-box I can create a textbox like hour:minute format. I could not use DateTime picker because people are not able to use the small time below the calendar and hence separated the controls.

----
http://www.astrovighnesh.com/website/index.php