A JavaScript custom event is fired if a <tc:panel/>
is collapsed or expanded.
tobago.panel.show
is fired before the panel is expanded.
tobago.panel.shown
is fired after the panel is expanded. (Does not wait for a possible Ajax reload.)
tobago.panel.hide
is fired before the panel is collaped.
tobago.panel.hidden
is fired after the panel is collapsed. (Does not wait for a possible Ajax reload.)