1 < script type = " text/javascript " >  
 2      var  People  =   function (name)
 3      {
 4          var  name  =  name;
 5
 6          this .speek  =   function ()
 7          {
 8              // 这public里面，可以调用private的initSpeek方法
 9             initSpeek();
10             alert( " 这是： "   +  name);
11         }
12
13          var  initSpeek  =   function ()
14          {
15             alert( " initSPeek " );
16         }
17
18          var  init  =   function ()
19          {
20              if  (name  ==   null )
21              {
22                 name  =   " name is null " ;
23             }
24              else
25              {
26                  // 注意，不能在private的init内调用public的speek方法
27                  try
28                  {
29                      this .speek();
30                 }
31                  catch (e)
32                  {
33                     alert(e.message);
34                 }
35
36             }
37         }
38
39         init();
40     }
41
42      var  zhang  =   new  People();
43     zhang.speek();
44      var  li  =   new  People( " 李四 " );
45     li.speek();
46 </ script >