<!DOCTYPE html>
<html>
<body>
<h1>JavaScript 变量</h1>
<p>您可以在一条语句中声明许多变量。</p>
<p id="demo"></p>
<script>
var person = "Bill Gates", carName = "porsche", price = 150000;
document.getElementById("demo").innerHTML = carName;
</script>
</body>
</html>