function is_less(i,k) {
	if (i < k) return true;
else return false;
}

	function menu_swap(menu_group,id,level,type) {

		if (type=='on') document.getElementById('mg_'+menu_group+'_'+id).className='menu_'+menu_group+'_level'+level+'_on';
		if (type=='off') document.getElementById('mg_'+menu_group+'_'+id).className='menu_'+menu_group+'_level'+level;
		
		if (type=='on') document.getElementById('menurow_'+id+'_level'+level).className='menurow_'+menu_group+'_level'+level+'_on';
		if (type=='off') document.getElementById('menurow_'+id+'_level'+level).className='menurow_'+menu_group+'_level'+level;
		
	}