js对象或json对象深拷贝

/**
* 深拷贝js对象
* @param obj
* @returns {{}}
*  Created by shantao on 2016/2/1.
*/
var deepCopy = function(obj) {
var newO = {};
if (obj instanceof Array) {
newO = [];
}
for ( var key in obj) {
var val = obj[key];
newO[key] = typeof val === 'object' ? arguments.callee(val) : val;
}
return newO;
}