js对象转换成string类型

function objConvertStr(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 + "\":" + objConvertStr(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(objConvertStr(o[i]))
                        r = "[" + r.join() + "]";
                    }
                    return r;
                }
                return o.toString().replace(/\"\:/g, '":""');
            }

 

from :http://zhidao.baidu.com/question/312541214.html