代码示例:(标识:eg_js_object_variable)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript 变量</h2>

<p id="demo"></p>

<script>
// 创建并显示变量:
var car = "porsche";
document.getElementById("demo").innerHTML = car;
</script>

</body>
</html>
运行结果: