function pageOver(dir, no) {
	switch(no) {
	case 1:
		document.images['page1'].src = dir + "images/page_menu_access_ro.gif";
		break;
	case 2:
		document.images['page2'].src = dir + "images/page_menu_station_ro.gif";
		break;
	case 3:
		document.images['page3'].src = dir + "images/page_menu_driver_ro.gif";
		break;
	case 4:
		document.images['page4'].src = dir + "images/page_menu_air_ro.gif";
		break;
	}
}
function pageOut(dir, no) {
	switch(no) {
	case 1:
		document.images['page1'].src = dir + "images/page_menu_access.gif";
		break;
	case 2:
		document.images['page2'].src = dir + "images/page_menu_station.gif";
		break;
	case 3:
		document.images['page3'].src = dir + "images/page_menu_driver.gif";
		break;
	case 4:
		document.images['page4'].src = dir + "images/page_menu_air.gif";
		break;
	}
}