Javascript简单实现面向对象编程继承实例代码

<script type="text/javascript">//父类ClassAfunction ClassA(sColor) {  this.color = sColor;  this.sayColor = function () {    document.write("Color:" + this.color + "<br/>");  };}//子类ClassB,继承自ClassAfunction ClassB(sColor,sName){    ClassA.call(this,sColor);//利用call函数，将ClassA的所有方法都赋给ClassB，即实现了继承  this.name = sName;  this.sayName = function(){    document.write("Name:" + this.name + "<br/>");  }}var oClassA = new ClassA("Red");oClassA.sayColor();var oClassB = new ClassB("Blue","Jimmy.Yang");oClassB.sayColor();//这里sayColor方法是从ClassA继承来的oClassB.sayName();//这是ClassB中的新方法/*call函数的演示示例function sayColor(sPrefix, sSuffix) {alert(sPrefix + this.color + sSuffix);};var obj = new Object();sayColor.call(obj, "The color is ", ", a very nice color indeed. ");*/</script>