jQuery深层次复制对象

<script type="text/javascript" src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
var obj1 = {
  'a': 's1',
  'b': [1,2,3,{'a':'s2'}],
  'c': {'a':'s3', 'b': [4,5,6]}
}

var obj2 = $.extend(true, {}, obj1);
obj2.a='s1s1';
obj2.b[0]=100;
obj2.c.b[0]=400;

console.log(obj1);
console.log(obj2);