Since APEX 4.2, there is a way to do this easily.
We start by creating the application process that needs to be triggered. It is important that you choose the event type “Custom”, and give it a name.
$('#dynamicactionresult > .uRegionContent').html('Dynamic action triggered successfully');
Where TriggerMe references the name of your “custom event”.
Older versions of APEX 4.x
The above only works from APEX 4.2. However, for the older versions of APEX 4 there is a workaround!
Finally, we trigger this application process by forcing a change-event on the page item. This can be done with the following piece of code.