Is there any resource to more complex interactions than the captured with Real Browser Recorder.

I have some keyboard autocomplete events that I need to script in monitor.

I need something like:

type_keys_by_id("username","KEY_DOWN","disp_username,"#SEP#id=username#SEP#name=username#SEP#css=#
topmenu>li>input[1]#SEP#xpath=//ul[@id='topmenus']/li/input[1]#XPATH#//input[1]#XPATH
#//tr[2]/td/ul/li/input[1]#XPATH##SEP#")

and besides KEYDOWN, other keys like ENTER.

thank you