改进版通过Json对象实现深复制的方法

var obj = {
sayName: function() {
alert(this.name);
},
name:'静水渊'
};
function clone(){
var str,newObj;
str= JSON.stringify(obj, function(key, value) {
return (typeof value == 'function' ? value.toString().replace(/^function(.*)/g, "jsonFunction$1") : value);
});
newObj = JSON.parse(str, function (key, value) {
if (/^jsonFunction(.*)/.test(value)) {
var strFun = '('+value.replace(/^jsonFunction(.*)/, "function$1")+')';
value = eval(strFun);
}
return value;
});
return newObj;
}
var cloneObj=clone(obj);
cloneObj.sayName();