原型链的继承

 1 //圣杯模式
 2 function inherit(Target,Origin){
 3     function F(){};
 4     Target.prototype = new F();
 5     F.prototype = Origin.prototype;
 6     Target.prototype.constructor = Target;
 7     Target.prototype.uber = Origin.prototype;
 8 }
 9 
10 //雅虎 YUI3
11 var inherit = (function(){
12     var F = function(){};
13     return function(Target,Origin){
14         F.prototype = Origin.prototype;
15         Target.prototype = new F();
16         Target.prototype.constructor = Target;
17         Target.prototype.uber = Origin.prototype;
18     }
19 })