Simple HTML Button FAILS

by Carlo

HTML

<h1 id="title">Javascript example no.2</h1>
<input type="text" id="myTextField"/>
<input type="submit" id="byBtn" value="Change" onclick="change()"/>

JavaScript

function change(){

  var myNewTitle = document.getElementById('myTextField').value;
  if (myNewTitle.length == 0 ) {
    alert('Write Some real Text please.');
    return;
  }

  var title = document.getElementById('title');
  title.innerHTML = myNewTitle;

}