不建议使用Ajax异步false？

继续评论：当您似乎不需要 回调时 ，您似乎对它有些痴迷！:)

对现有代码的简单更改是丢弃

cnf

$("#form").submit(function (e) {    $.ajax({        type: "POST",        url: 'page.php',        data: $('#form').serialize(),        async: true,        success: function (responseText) { if (responseText.indexOf('err') != -1) {     // Do something when it fails here } else {     // Do something when it succeeds here!!!!     alert('ok');     // e.g. move on to "step 2" }        },        error: function () {// Do something when it fails here        }    });});