Resets the stimulus frames for a trial to their original state when the script was first parsed.
<likert>
<trial>
None.
The following resets all of the stimuli from a trial:
<trial sometrial>
/ stimulusframes = [1=fmask;2=prime;3=bmask;7=target]
/ ontrialend= [trial.sometrial.resetstimulusframes();]
</trial>
The following clears all of the stimuli from surveypage:
<surveypage somepage>
/ ontrialend= [surveypage.somepage.resetstimulusframes();]
</trial>