JS关于继承的一個例子

function SuperType(){

this.property = true;

} //Object.prototype == 

SuperType.prototype.getSuperValue = function(){

return this.property;

};

function SubType(){

this.subproperty = false;

}

//继承了 SuperType

SubType.prototype = new SuperType();

SubType.prototype.getSubValue = function (){

return this.subproperty;

};

var instance = new SubType();

alert(instance.getSuperValue());

SubType.prototype = new SuperType();

console.log(SubType.prototype.__proto__ == SuperType.prototype); //true