<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
function people(name,work){
this.name = name;
this.work = work;
//添加这个判断之后，无论创建几个新对象，里面的内容只加载一次，但每个对象都有效果
if( typeof this.info != "function"){
// alert(11111);
people.prototype.info=function () {
var box = document.createElement("div");
box.innerHTML=this.name + "的职业是"+ this.work;
document.body.appendChild(box);
}
//alert(22222);
}
};
var xiaoming = new people("小明","学生");
xiaoming.info(); //小明的身份是学生
var xiaohua = new people("小华","老师");
xiaohua.info(); //小华的职业是老师
var xiaofang = new people("小芳","医生");
xiaofang.info(); //小芳的职业是医生
var xiaohai = new people("小孩","护士");
xiaohai.info(); //小孩的职业是护士
</script>
</body>
</html>
此方法：比较好！
