interval Timer - Execute Timer on a regular interval
Do not place an interval timer inside a container that is being refreshed by the timer notify as this will have the effect of unnecessarily destroying and recreating the timer on each refresh.

Single Timer - Execute timer once after set duration.
Placing the single timer within a container that is refreshed by the timer notify will recreate the timer on each refresh effectively emulating an interval timer.

Back Refresh - Force page to refresh when accessed via the browser back button.