JavaScript------对象的使用

//申明
var str = {
        firstName: "John",
        lastName: "Doe",
        age: "50",
        eyeColor: "blue",
        fullName: function () {
            return this.firstName + " " + this.lastName;
        }
    }; 

//输出
alert(str["firstName"]);或alert(str.firstName);
//作为方法访问
alert(str.fullName());
//作为属性访问
alert(str.fullName);

  for (var x in str) {
  　　alert(str[x]);
  }