json格式转换

//Json字符串转成Json对象
如果用jQuery：
$.parseJSON('{"name":"John"}');
如果不用jQuery，可以引用json2.js
JSON.parse('{"name":"John"}');

//Json转成字符串
function Obj2str(o) {
    if (o == undefined) {
        return "";
    }
    var r = [];
    if (typeof o == "string") return "\"" + o.replace(/([\"\\])/g, "\\$1").replace(/(\n)/g, "\\n").replace(/(\r)/g, "\\r").replace(/(\t)/g, "\\t") + "\"";
    if (typeof o == "object") {
        if (!o.sort) {
            for (var i in o) r.push("\"" + i + "\":" + Obj2str(o[i]));
            if ( !! document.all && !/^\n?function\s*toString\(\)\s*\{\n?\s*\[native code\]\n?\s*\}\n?\s*$/.test(o.toString)) {
                r.push("toString:" + o.toString.toString());
            }
            r = "{" + r.join() + "}";
        } else {
            for (var i = 0; i < o.length; i++) r.push(Obj2str(o[i]));
            r = "[" + r.join() + "]";
        }
        return r;
    }
    return o.toString().replace(/\"\:/g, '":""');
}