Here you can see default client-side tool-tip

This tool-tip content was pre-rendered to the page.
The look of this tool-tip is 100% defined by skin.

This tool-tip will follow mouse. Also this tool-tip has a delay 0.5 sec, so be patient!

This tool-tip content also pre-rendered to the page.
However, the look of this tool-tip is customized
by styleClass attribute.

This tool-tip rendered on server in separate request.

Wait... This tool-tip content was rendered on server

This tool-tip will be activated on mouse click. It also has a bottom-left position.

Wait... This tool-tip content was rendered on server