js判断数组和对象

    <script>

    var arr=new Array();

    var obj={'1':2};

    var num=11;

    function isType(obj){

    if(obj instanceof Array)

    return 'Array';

    else if(obj instanceof Object)

    return 'Object';

    else

    return 'notObj'

    }

    console.log(isType(arr));

    console.log(isType(obj));

    console.log(isType(num));;

    </script>