例1，javascript 对象编程。
复制代码 代码示例:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>ObjectDemo--www.jb200.com</title>
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<script language="javascript">
{
function student(x,y,z){
this.x=x;
this.y=y;
this.z=z;
}
student.prototype.avg=3;
function stu_avg(){
return (this.x + this.y + this.z) / this.avg;
}
student.prototype.stuValue=stu_avg;
}
</script>
</head>
<body>
<script language="javascript">
{
var stu=new student(29,25,20);
var avgValue=stu.stuValue();
document.write(avgValue+"<br>");
var stu=new student(29,25,20);
stu.avg=1;
alert(stu.avg);
var avgValue=stu.stuValue();
document.write(avgValue);
}
</script>
<br>
This is page which test extend object .
<br>
</body>
</html>
例2，JavaScript的for加强的使用，for加强只使用于数组和对象中
复制代码 代码示例:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>ObjectDemo--www.jb200.com</title>
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<script language="javascript">
{
function student(name,age,num){
this.name=name;
this.age=age;
this.num=num;
}
}
</script>
</head>
<body>
<script language="javascript">
{
var stu=new student("xiaobi",25,20092700);
for(var i in stu){ // usage
alert("i"+i);
document.write(stu[i]+"<br>");
}
}
</script>
<br>
This is page which test function which name is for in object .
<br>
</body>
</html>
