generating random numbers in input box on button click javascript

<input type='text' id="randid" name="some" value='15' />
<br/><br/>
<button id="xx">Get new number</button>



var input = document.querySelector('#randid'),
      btn = document.querySelector('#xx');

btn.addEventListener('click', function() {
  var MIN = 10000, MAX = 99999999;
  input.value = Math.floor(Math.random() * (MAX - MIN + 1)) + MIN;
});