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

<h1>JSON 数组</h1>

<p>访问 JSON 对象的数组值。</p>

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

<script>
var myObj, x;
myObj = {
  "name":"Bill Gates",
  "age":62,
  "cars":[ "Porsche", "BMW", "Volvo" ]
};
x = myObj.cars[0];
document.getElementById("demo").innerHTML = x;
</script>

</body>
</html>
运行结果: