​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>JSON 对象</h1>
​
<p>如何遍历 JSON 对象中的所有属性。</p>
​
<p id="demo"></p>
​
<script>
var myObj, x;
myObj = {"name":"Bill Gates", "age":62, "car":null};
for (x in myObj) {
  document.getElementById("demo").innerHTML += x + "<br>";
}
</script>
​
</body>
</html>
​