​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>使用括号表示法修改 JavaScript 对象：</h1>
​
<p id="demo"></p>
​
<script>
var myObj, x;
myObj = { name: "Bill Gates", age: 62, city: "Seattle" };
myObj["name"] = "Steve Jobs";
document.getElementById("demo").innerHTML = myObj.name;
</script>
​
</body>
</html>
​