Insert dash after every 2nd character in input

Insert dash after every 2nd character in input using JavaScript -

Example looks like -

<script>

  $('.shortCodeText').keyup(function() {

    var shortCode = $(this).val().split("-").join(""); // remove hyphens

    if (shortCode.length > 0) {

      shortCode = shortCode.match(new RegExp('.{1,2}', 'g')).join("-");

    }

    $(this).val(shortCode);

   

  });

  $('#btnclick').on('click', function(){

      console.log($('.shortCodeText').val());

  });

</script>

And HTML

<div>

    <input type="text" class="shortCodeText" max="6" maxlengthh="6" />

    <a id="btnclick">Result</a>

</div>

And the live Result - http://jsfiddle.net/26hvo5ed/