function foo(){}
foo.prototype = {
foo_prop: "foo val"
};
function bar(){}
var proto = new foo;
proto.bar_prop = "bar val";
bar.prototype = proto;
var inst = new bar;
console.log(inst.foo_prop);
console.log(inst.bar_prop);
结果：
foo val
bar val
说明：如果有精彩文章或者技巧，欢迎投稿
