复制代码 代码如下:

//js中的数组可以以键值对的方式存在

var arr = new Array();

arr["A"] = "boss";

arr["B"] = "Emp";

for (var m in arr) {

document.write(arr[m] + " ");

}

var person = new Object();

person["name"] = "xiaoli";

person["age"] = "18";

person["salary"] = "1888.9";

for (var p in person) {

document.write(person[p] + "<br>");

}

//测试使用有age属性呢？

if (typeof person["age"] == "undefined") {

document.write("no");

}