Have a time seperator : within a input field

Is it possible to have a : separator in a form input field for a manual time input? Something like the following example:

<p> 
<div class='field'>
  <label for='$time_in'>Time In</label>
<input type='text' name='time_in' id='time_in'
  size='10' maxlength='5' /></div>
</p>

Using "Internet explorer"