Convert string to nested movieclip

programming flash
1

How do I join two strings into a movieclip so that it works out to string1_mc.string2_mc

i.e.

var monthID = “monthCal”+newMonth

var dayID = “day”+monthArray[newMonth][e].eventDate;

trace(this[monthID]._name) // this works and traces the correct name
trace(this[monthID].calendar_mc.this[dayID]._name); // this does not work.

the dayID is in calendar_mc, which is in the monthID