<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <script type="text/javascript"> var obj = { a: { b: 10 } } function copy(obj){ if(typeof obj != ‘object‘){ return obj; } var newObj = {}; for(attr in obj){ newObj[attr] = copy(obj[attr]); } return newObj; } var obj2 = copy(obj); obj2.a.b =20; alert(obj.a.b);//10 </script> </head> <body> </body> </html>
利用递归对复杂对象进行拷贝
原文：http://www.cnblogs.com/toodeep/p/4474060.html