title: jquery- How to automatically insert colon after entering 2 numeric digits
body: <p>I want a to have a text box which accepts HH:MM(hours/minutes) format. So, when the user enters the value for HH, it should automatically insert a colon after that and let the user enter value for MM.</p>
  
  <p>I do not want to use any plugin for this.</p>
  
  <p>How do i do this?</p>
  
  <p>thanks</p>