html运行实例（eg_js_json_object_modify

代码示例：（标识：eg_js_json_object_modify_bracket）

<!DOCTYPE html>
<html>
<body>

<h1>JSON 对象</h1>

<p>如何使用括号表示法修改 JSON 对象中的值。</p>

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

<script>
var myObj, i, x = "";
myObj = {
  "name":"Bill Gates",
  "age":62,
  "cars": {
  "car1":"Porsche",
  "car2":"BMW",
  "car3":"Volvo"
  }
}
myObj.cars["car2"] = "Mercedes Benz";

for (i in myObj.cars) {
  x += myObj.cars[i] + "<br>";
}

document.getElementById("demo").innerHTML = x;
</script>

</body>
</html>