function selectTab(tabId) {
	$('tab_' + tabId).removeClassName("tab_free");
	$('tab_left_' + tabId).removeClassName("tab_free_left");
	$('tab_right_' + tabId).removeClassName("tab_free_right");
	$('tab_center_' + tabId).removeClassName("tab_free_center");
	$('tab_arrow_' + tabId).removeClassName("tab_free_arrow");
	$('tab_' + tabId).addClassName("tab_select");
	$('tab_left_' + tabId).addClassName("tab_select_left");
	$('tab_right_' + tabId).addClassName("tab_select_right");
	$('tab_center_' + tabId).addClassName("tab_select_center");
	$('tab_arrow_' + tabId).addClassName("tab_arrow");
}
function deselectTab(tabId) {
	$('tab_' + tabId).removeClassName("tab_select");
	$('tab_left_' + tabId).removeClassName("tab_select_left");
	$('tab_right_' + tabId).removeClassName("tab_select_right");
	$('tab_center_' + tabId).removeClassName("tab_select_center");
	$('tab_arrow_' + tabId).removeClassName("tab_arrow");
	$('tab_' + tabId).addClassName("tab_free");
	$('tab_left_' + tabId).addClassName("tab_free_left");
	$('tab_right_' + tabId).addClassName("tab_free_right");
	$('tab_center_' + tabId).addClassName("tab_free_center");
	$('tab_arrow_' + tabId).addClassName("tab_free_arrow");
}
function selectMenu(menuId) {
	if (lastSelectedMenu) {
		deselectTab(lastSelectedMenu);
		hideSubMenu(lastSelectedMenu);
	}
	lastSelectedMenu = menuId;
	selectTab(menuId);
	showSubMenu(menuId);
}
function deselectMenu(menuId) {
	deselectTab(menuId);
	hideSubMenu(menuId);
	if (currentSelectedMenu) {
		selectTab(currentSelectedMenu);
		showSubMenu(currentSelectedMenu);
	}
	lastSelectedMenu = currentSelectedMenu;
}
function showSubMenu(menuId) {
	if ($('sub_menu_' + menuId)) {
		$('sub_menu_' + menuId).show();
	}
}
function hideSubMenu(menuId) {
	if ($('sub_menu_' + menuId)) {
		$('sub_menu_' + menuId).hide();
	}
}