The XHR objects are kept in an array that allocates one element for each form.

这些 XHR 对象保存在一个数组内，数组为每个表单分配一个数组元素。

The sendHttpRequest method sends the data to the mid-tier service using the XHR object.

sendHttpRequest方法使用XHR对象将数据发送给中间层服务。

XHR evaluation is an option but you are open to XSS attacks and all scripts must have the same domain.

XHR 评估是一个选择，但是您得对XSS 攻击开放，而且所有脚本必须在同一个域中。