javascript继承的两种方式

 1 <script type="text/javascript">
 2 function A()
 3 {
 4     this.name=‘a‘;    
 5 }
 6 function B()
 7 {
 8 
 9 }
10 
11 
12 B.prototype=new A();
13 var obj=new B();
14 
15 alert(obj.name);
16 </script>

 1 <script type="text/javascript">
 2 function A()
 3 {
 4     this.name=‘a‘;    
 5 }
 6 function B()
 7 {
 8    A.call(this);    
 9 }
10 
11 var obj=new B();
12 
13 alert(obj.name);
14 </script>