function data_string(str) {    var d = eval('new ' + str.substr(1, str.length - 2));    console.log(d);    return formatDate(d);}function formatDate(now) {    var year = now.getFullYear();    var month = now.getMonth() + 1;    var date = now.getDate();    var hour = now.getHours();    var minute = now.getMinutes();    var second = now.getSeconds();    return year + "-" + month + "-" + date + "   " + hour + ":" + minute + ":" + second;}

调用data_string方法