创建了对象的一个新实例，并向其添加了四个属性：
person=new Object();//不要varperson.firstname="Bill";person.lastname="Gates";person.age=56;person.eyecolor="blue";
替代代码：
var person={firstname:"John",lastname:"Doe",age:50,eyecolor:"blue"};使用对象构造器：
function person(firstname,lastname,age,eyecolor){this.firstname=firstname;this.lastname=lastname;this.age=age;this.eyecolor=eyecolor;}var tercher=new person("Bill","Gates",56,"blue");在构造器函数内部定义对象的方法：
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;}}调用：
myMother.changeName("Ballmer");循环遍历对象的属性：
<!DOCTYPE html><html><body><p>点击下面的按钮，循环遍历对象 "person" 的属性。</p><button onclick="myFunction()">点击这里</button><p id="demo"></p><script>function myFunction(){var x;var txt="";var person={fname:"Bill",lname:"Gates",age:56}; for (x in person){txt=txt + person[x];}document.getElementById("demo").innerHTML=txt;}</script></body></html>结果：BillGates56
参考：JS对象创建、JS创建类和对象
JS——创建对象
原文地址：http://www.cnblogs.com/wuqiuxue/p/7687603.html