<!DOCTYPE html>
<html>
<body>
<h2>JavaScript 对大小写敏感</h2>
<p>请试着把 lastName 改为 lastname。</p>
<p id="demo"></p>
<script>
var lastname, lastName;
lastName = "Gates";
lastname = "Jobs";
document.getElementById("demo").innerHTML = lastName;
</script>
</body>
</html>