案例：JavaScript案例     状态：可编辑再运行    进入竖版
 运行结果　
​x
 
1
<html>
2
<body>
3
​
4
<script type="text/javascript">
5
​
6
function Car(sColor,iDoors,iMpg) {
7
  this.color = sColor;
8
  this.doors = iDoors;
9
  this.mpg = iMpg;
10
  this.drivers = new Array("Mike","John");
11
12
  if (typeof Car._initialized == "undefined") {
13
    Car.prototype.showColor = function() {
14
      alert(this.color);
15
    };
16
17
    Car._initialized = true;
18
  }
19
}
20
​
21
var oCar1 = new Car("red",4,23);
22
var oCar2 = new Car("blue",3,25);
23
​
24
oCar1.drivers.push("Bill");
25
​
26
document.write(oCar1.drivers);
27
document.write("<br />")
28
document.write(oCar2.drivers);
29
​
30
</script>
31
​
32
</body>
33
</html>
34
​