function trim_space(str)
	trim_space=trim(str)
end function

function check_numeric(str)
	if isnumeric(str) = true then
		check_numeric = true
	else
		check_numeric = false
	end if
end function

function check_intro(str)
	str = replace(str,"[ȸ»ç°³¿ä]","")
	str = replace(str,"[»ç¾÷¼Ò°³]","")
	str = replace(str,"[ȸ»ç¿¬Çõ]","")
	check_intro = trim(str)
end function