用户代理可以用某种数值控件显示这一信息，也可以在工具提示中显示额外的数据，但是最常见的情况可能是像其他内联元素一样对它应用样式。
User agents can display this information using some sort of meter control or give the extra data in a tooltip, but most will probably style it like any other inline element.
文本控件还可以包含一个“工具提示”，提供关于控件用途的信息(所有控件都支持这一特性)。
The text control can also have a "tool tip" that can provide information about its use (all controls support this feature).
这些附加功能还包括一些UI控件，如accordion、可排序的html表、scroller、工具提示和Ajax spinner overlays。
The add-on also boasts some UI controls such as accordion, sortable HTML tables, scrollers, tooltips, and Ajax spinner overlays.
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