The hidden variable on the form (Figure 20) is used to persist this value between different command actions on the page.

表格上的隐藏变量(图 20）用于在页面上不同命令动作间保持其值。

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Instead, all the work is hidden behind higher level APIs that let you either query and manipulate server-side components directly, or invoke actions and update regions of a given page.

相反，所有工作都藏于较高层api背后，让您可以直接查询和处理服务器端组件，也可以调用动作和更新给定页面的某些部分。

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The code could be modified to work with the actions that are currently hidden in the custom theme.

可以修改代码来使用当前在自定义主题中隐藏的动作。

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