Hi,
It depends what exactly you need to trigger...
If you just need to navigate to some item in the Ajax DTN (left menu) , there is an API for that:
The standard SAP navigation uses the LSAPI.
See more details about navigation apis:
http://help.sap.com/saphelp_nw73/helpdata/en/c8/5eacdc37434cfb8ec5e5288b884100/content.htm
https://help.sap.com/saphelp_nw73/helpdata/en/4a/2a0113ab9247dbe10000000a42189c/content.htm
Thanks,
Tal