js中定义用字符串拼接起来的变量名的变量

<script>

    function createObject(){
        for ( var i = 0; i < 3; i++){
            var objName="obj"+i;
            window[objName]= new Object({
                name:"第"+i+"个人的名字",
                age:"第"+i+"个人的年龄"
            });
        }
    }

    function getObject(){
        for ( var i = 0; i < 3; i++){
            var objName="obj"+i;
            alert(window[objName].name+"-->"+window[objName].age);
        }
    }

    createObject();
    getObject();

</script>