title: regex for number between numbers
body: <p>I'm in need of a regex, which takes a minimum and a maximum number to determine valid input, And I want the maximum and minimum to be dynamic.</p>
  <p>I have been trying to get this done using this link
  <a href="https://stackoverflow.com/a/13473595/1866676">https://stackoverflow.com/a/13473595/1866676</a>
  But couldn't get it to work. Can someone please let me know how to do this.</p>
  <hr />
  <p>Let's say I want to make a html5 input box, and I Want it to only receive numbers from 100 to 1999</p>
  <p>What would a regex for this like this look like?</p>