1 <script type="text/javascript">
2 function baseClass()
3 {
4 this.showMsg = function()
5 {
6 alert("baseClass::showMsg");
7 }
8
9 this.baseShowMsg = function()
10 {
11 alert("baseClass::baseShowMsg");
12 }
13 }
14 baseClass.showMsg = function()
15 {
16 alert("baseClass::showMsg static");
17 }
18
19 function extendClass()
20 {
21 this.showMsg =function ()
22 {
23 alert("extendClass::showMsg");
24 }
25 }
26 extendClass.showMsg = function()
27 {
28 alert("extendClass::showMsg static")
29 }
30
31 extendClass.prototype = new baseClass();
32 var instance = new extendClass();
33
34 instance.showMsg(); //显示extendClass::showMsg
35 instance.baseShowMsg(); //显示baseClass::baseShowMsg
36 instance.showMsg(); //显示extendClass::showMsg
37
38 baseClass.showMsg.call(instance);//显示baseClass::showMsg static
39
40 var baseinstance = new baseClass();
41 baseinstance.showMsg.call(instance);//显示baseClass::showMsg
42 </script>
