<script>
function Lecture(name,teacher){
this.name=name;
this.teacher=teacher;
}
Lecture.prototype.display=function(){
return this.teacher+"is teaching "+this.name;
}
function Schedule(lectures){
this.lectures=lectures;
}
Schedule.prototype.display=function(){
var str="";
for(var i=0;i<this.lectures.length;i++)
str+=this.lectures[i].display()+"! ";
return str;
}
var myLecture=new Lecture("Gym","Hunk Wang");
var myLecture2=new Lecture("Tom","Ducklyl");
var myArray=new Array(myLecture,myLecture2);
var mySchedule=new Schedule(myArray);
alert(mySchedule.display());
</script>
q行l果为：Hunk Wang is teaching Gym! Ducklyl is teaching Tom!
下面分析一下流E，以上建立两个c?font style="background-color: #c7edcc">Lecture?font style="background-color: #c7edcc">ScheduleQ?br />
首先初始?font style="background-color: #c7edcc">Lecturec，调用LecturecL造函敎ͼ接着?font style="background-color: #c7edcc">Lecturecȝ对象Q作为参C入Schedulec，Schedule对象初始化，从而实Cq结果?br />
不难发现Q这U方式和java是类似的。只qjavascript要真正实现面象对象，q需要很多过E实现?br />
期待后箋?br />
]]>
function Circle(radius)
{
this.r = radius;
}
Circle.PI = 3.14159;
Circle.prototype.area = function(){
return Circle.PI * parseInt(this.r) * parseInt(this.r);
}
//定义ChildCircle子类
function ChildCircle(radius){
this.root=Circle;
this.root(radius);//调用父类的构造函敎ͼ也可以通过call方式调用
// Circle.call(this,radius);
}
ChildCircle.prototype=new Circle();//声明l承Q?font style="background-color: #c7edcc">ChildCirclel承了Circle的所有方?/font>
//子类覆盖父类的方法area
ChildCircle.prototype.area = function(){
return 2 * parseInt(this.r) * parseInt(this.r);
}
var d = new ChildCircle(2);
alert(d.area());
以上是一个简单的例子来说明javascript也可实现面向对象的机Ӟ关键看你如何应用。在设计较大规模的JSE序Ӟ利用JS本n的特性（Zprototype的承）Q借鉴面向对象~程的方法，模拟cȝ定义与承机Ӟ会开发的JSE序h更高的质量?br />
]]>
#demo{overflow:hidden;width:120px;text-align:center;padding:10px;}
#demo img{border:none;width:100px;height:100px;border:5px solid #f4f4f4}
#enlarge_images{position:absolute;display:none;z-index:2;border:5px solid #f4f4f4}
</style>
<div id="demo" style="overflow:hidden;width:120px;text-align:center;padding:10px">
<img src="http://www.cnwebshow.com/uploadfile/web/uploadfile/200801/20080113054140200.jpg">
</div>
<div id="enlarge_images"></div>
<script>
var demo = document.getElementById("demo");
var gg = demo.getElementsByTagName("img");
var ei = document.getElementById("enlarge_images");
for(i=0; i<gg.length; i++){
var ts = gg[i];
ts.onmousemove = function(event){
event = event || window.event;
ei.style.display = "block";
ei.innerHTML = '<img src="' + this.src + '" />';
ei.style.top = document.body.scrollTop + event.clientY + 10 + "px";
ei.style.left = document.body.scrollLeft + event.clientX + 10 + "px";
}
ts.onmouseout = function(){
ei.innerHTML = "";
ei.style.display = "none";
}
ts.onclick = function(){
window.open( this.src );
}
}
</script>
转自Qhttp://www.phpweblog.net/fuyongjie/archive/2008/08/26/5649.html#5661
]]>