js 采用delete实现继承示例代码

//采用对象冒充的方式实现js继承 
function A(color) { 
this.Acolor = color; 
this.AshowColor = function() { 
document.writeln("Acolor: " + this.Acolor); 
} 
} 

function B(color, name) { 
//将newMethod赋值A，调用A的构造函数 
this.newMethod = A; 
this.newMethod(color); 
//然后删除对A的引用,这样以后不能调用他 
delete this.newMethod; 

this.Bname = name; 
this.BshowName = function() { 
document.writeln("Bname: " + this.Bname); 
} 
} 

var objA = new A("red"); 
objA.AshowColor(); 
document.writeln("----------------"); 
var objB = new B("black", "demo"); 
objB.AshowColor(); 
objB.BshowName(); 
document.writeln("----------------");