function nextmonth() {
cmonth=Number(document.resonline_calendar.month_num.value);
nmonth=cmonth+1;
if (nmonth == 11) {
	nmonth=1;
	}
document.resonline_calendar.month_num.value = nmonth;
document.calendar.src='http://66.201.110.115/calendars/calendar_40075_avail'+nmonth+'.gif';
}

function lastmonth() {
cmonth=Number(document.resonline_calendar.month_num.value);
nmonth=cmonth-1;
if (nmonth == 0) {
	nmonth=6;
	}
document.resonline_calendar.month_num.value = nmonth;
document.calendar.src='http://66.201.110.115/calendars/calendar_40075_avail'+nmonth+'.gif';
}