Real-time total calculation using JavaScript

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Calculate total</title>
<!--http://stackoverflow.com/a/11320760/835950-->
<script type="text/javascript">
function calc() {
  var total = document.getElementById('q1').value + document.getElementById('q2').value;
  document.getElememntById('total').value = total;
}
</script>
</head>

<body>
<input type="text" name="q1" id="q1" onChange="calc()">
<input type="text" name="q2" id="q2" onChange="calc()">
<input type="text" name="total" id="total">
</body>
</html>