calendar - Cannot find function createEvent in object -

i have no idea why getting error... of other code in script commented out... appreciated!

error message: typeerror: cannot find function createevent in object . (line 16, file "code")

function createevent(test)  { var cal = calendarapp.getcalendarsbyname(test); var title = 'script demo event'; var start = new date("april 5, 2013 08:00:00 pdt"); var end = new date("april 5, 2013 10:00:00 pdt"); var desc = "created using google apps script"; var loc = "script center"; var event = cal.createevent(title, start, end, {description:desc, location:loc}); }; 

(friend figured out) these 2 not play together....

createevent , getcalendarsbyname

createevent must use getcalendarsbyid