Js数组 是怎么做类似java中的深拷贝的

[i594yangyang]

var old = new Array([1,2],[6,7]);
var new = old;
new[1][1] = 100;
document.write(old[1][1]);

输出为： 100

tt改变了,temp也改变了
我的本意是: new改变了,但是new不能变。

java里面有深拷贝的概念,在js是怎么实现的

[meizz]

<SCRIPT LANGUAGE="JavaScript">
<!--
Array.prototype.clone=function()
{
var a = [];
for(var i=0; i<this.length; i++)
{
if("object"==typeof(this[i]) && "undefined"!=typeof(this[i].length))
a[i] = this[i].clone();
else
a[i] = this[i];
}
return a;
}
var old = new Array([1,2],[6,7]);
var news = old.clone();
news[1][1] = 100;

alert(old[1][1]);
//-->
</SCRIPT>

[i594yangyang]

十分感谢

[knightzhuwei]

深拷贝
<script>
Object.prototype.clone=function()
{

var a = {};
for(var i in this)
{
if( "object"==typeof(this[i]))
a[i] = this[i].clone();
else
a[i] = this[i];
}
return a;
}
var earrData=[

{name:"最新类",secondMenu:[
{id:1,name:"股票财经",slimg:"menu1_6.png",sdimg:"menu0_6.png",stat:1,opimg:"opeart3.jpg",dlimg:"list1_6.png",ddimg:"list0_6.png",desc:"",widgetdownaddress:"ManagerWidget/epg/app/app120.dapx",widgetversion:1.500},
{id:2,name:"视频电话",slimg:"menu1_7.png",sdimg:"menu0_7.png",stat:1,opimg:"opeart1.jpg",dlimg:"list1_7.png",ddimg:"list0_7.png",desc:"",widgetdownaddress:"/epg/app/app120.dapx",widgetversion:1.500}
]}

];

var data1 = new Array();

data1 = earrData.clone();
data1[0].secondMenu = [];

alert(earrData[0].secondMenu.length);
</script>