html运行实例（eg_js_array_associative

代码示例：（标识：eg_js_array_associative_2）

<!DOCTYPE html>
<html>
<body>

<h1>JavaScript 数组</h1>

<p>如果在访问数组时使用命名索引，JavaScript 会将数组重新定义为标准对象，并且某些数组方法和属性将产生未定义或不正确的结果。</p>

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

<script>
var person = [];
person["firstName"] = "Bill";
person["lastName"] = "Gates";
person["age"] = 19; 
document.getElementById("demo").innerHTML =
person[0] + " " + person.length;
</script>

</body>
</html>