1.创建对象
person=new Object();
person.firstname="John";
person.lastname="Doe";
person.age=50;
person.eyecolor="blue";
或person={firstname:"John",lastname:"Doe",age:50,eyecolor:"blue"};
2.构造函数
function person(firstname,lastname,age,eyecolor){
this.firstname=firstname;
this.lastname=lastname;
this.age=age;
this.eyecolor=eyecolor;
this.changeName=changeName;
function changeName(name){
this.lastname=name;
}
}
myMother=new person("Sally","Rally",48,"green");
myMother.changeName("Doe");
3.for...in
循环中的代码块将针对每个属性执行一次