/**          * json对象转字符串形式         */         function json2str(o) {             var arr = [];             var fmt = function(s) {                 if (typeof s == 'object' && s != null) return json2str(s);                 return /^(string|number)$/.test(typeof s) ? "'" + s + "'" : s;              }             for (var i in o) arr.push("'" + i + "':" + fmt(o[i]));             return '{' + arr.join(',') + '}';          }