<body>
<div id="demo"></div>
<script>
/*方法一：使用點號（.）來訪問 JSON 對象的值*/
var myObj, x; //定義變量
myObj = { "name":"runoob", "alexa":10000, "site":null };
x = myObj.name;
document.getElementById("demo").innerHTML = x;
/*方法二：使用中括號（[]）來訪問屬性的值*/
var myObj, x;
myObj = { "name":"runoob", "alexa":10000, "site":null };
x = myObj["name"];
document.getElementById("demo").innerHTML = x;
/*for in遍歷獲取屬性*/
var myObj = { "name":"runoob", "alexa":10000, "site":null };
for (x in myObj) { document.getElementById("demo").innerHTML += x + "<br>"; }
/*for in遍歷獲取屬性值*/
//在使用for遍歷時，只能通過 myObj[x] 來獲取相應屬性的值，而不能使用 myObj.x
var myObj = { "name":"runoob", "alexa":10000, "site":null };
for (x in myObj) {
document.getElementById("demo").innerHTML += myObj[x] + "<br>";
}
</script>
</body>