javascript继承call()和apply实现继承

　　call方法是Function对象中的方法,因此我们定义的每个函数都拥有该方法。可以通过函数名来调用call方法,call方法的第一个参数会被传递给函数中的this,从第2个参数开始,挨个赋值给函数中的参数

function person(name){
        alert(name+"  :  "+this.hobby);    
    }
    var obj=new Object();
    obj.hobby="打酱油";
    person.call(obj,"小张");

(2)

 1 <script language="javascript" type="text/javascript">
 2     function Parent(name){
 3         this.name=name;
 4         this.sayHello=function(){
 5             alert(this.name);    
 6         }
 7     }
 8     function Child(name,hobby){
 9         this.hobby=hobby;
10         Parent.call(this,name);    
11         this.say=function(){
12             alert(this.name+"  :  " +this.hobby);    
13         }
14     }    
15     var ch=new Child("小明","打酱油");
16     ch.sayHello();
17     ch.say();
18 </script>

apply方法实现继承

 1     
 2     function Parent(name){
 3         this.name=name;
 4         this.sayHello=function(){
 5             alert(this.name);    
 6         }
 7     }
 8     function Child(name,hobby){
 9         this.hobby=hobby;
10     
11         Parent.apply(this,[name]/* 或者new Array(name) */);
12         this.say=function(){
13             alert(this.name+"  :  "+this.hobby);    
14         }
15     }
16     var ch=new Child("小明","打酱油");
17     ch.sayHello();
18     ch.say();