js 判断l对象类型

var obj = {};
obj.isObject = function (obj) {
    return Object.prototype.toString.call(obj) == '[object Object]';
};
obj.isArray = function (array) {
    return Object.prototype.toString.call(array) == '[object Array]';
};
obj.isFunction = function (fun) {
    return Object.prototype.toString.call(fun) == '[object Function]';
};
//调用
console.log(obj.isObject({}));
console.log(obj.isArray([]));
console.log(obj.isFunction(function () { }));