jQuery Tooltip
jQuery Tooltip 插件取代了原生的工具提示框，让它们可自定义，您只需要调整它们的内容、位置和外观即可。
该插件目前版本是 1.3，已经很长时间没有更新，推荐使用 jQuery UI 工具提示框（Tooltip）。
如需了解更多有关 jQuery UI 工具提示框（Tooltip）的细节，请查看 API 文档 jQuery UI 工具提示框部件（Tooltip Widget）。
实例演示
jQuery Tooltip 插件演示。
jQuery UI Tooltip - Default functionality
Tooltips can be attached to any element. When you hover
the element with your mouse, the title attribute is displayed in a little box next to the element, just like a native tooltip.
But as it's not a native tooltip, it can be styled. Any themes built withThemeRollerwill also style tooltips accordingly.
Tooltips are also useful for form elements, to show some additional information in the context of each field.
Your age:
Hover the field to see the tooltip.
