function hs_menuSubItem(idx)
	
	if cntMenuHead(idx).style.display = "block" then
		cntMenuHead(idx).style.display = "none"
		exit function
	end if
	for i = 0 to cntMenuHead.length - 1
    	cntMenuHead(i).style.display = "none"
    next
    cntMenuHead(idx).style.display = "block"
    
end function