小编i11*_*997的帖子

 <script>
    function createPerson(firstName, lastName)
    {
        return
        {
            firstName: firstName,
            lastName: lastName, //This line!!!
            getFullName: function() {
                return this.firstName + " " + this.lastName;
            },
            greet: function(person) 
            {
             alert("Hello, " + person.getFullName() + "I'm " + this.getFullName());
            }

        };
    }
    var johnDoe = createPerson("John" , "Doe");
    var janeDoe = createPerson("Jane" , "Doe");

    johnDoe.greet(janeDoe);
</script>

为什么这一行会抛出错误？"意外的标记 :".这是一本书的例子,我做了完全相同的事情,但这个错误出现了.不知道出了什么问题.