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

<h1>JavaScript 数组方法</h1> 

<p>使用索引号访问数组元素:</p>

<p id="demo1"></p>
<p id="demo2"></p>

<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML = fruits;
fruits[0] = "Lemon";
document.getElementById("demo2").innerHTML = fruits;
</script>

</body>
</html>
运行结果: