var strJson="{name:'張三'}";//json
var obj=eval("("+strJson+")");//轉換后的json對象
alert(obj.name);//json name

var strJSON = "{name:'張三'}";
var obj = eval(strJSON);
alert(obj.constructor);//String 構造函數
alert(obj.name);//undefine

var strJSON = "{name:'張三'}";//得到的JSON
var obj = new Function("return" + strJSON)();//轉換后的JSON對象
alert(obj.name);//json name