function on_menu(area) {
	tMenu = document.getElementById(area).style;
	tMenu.display = "block";
	document.getElementById("otherbtn").src="shared/img/navi05_o.gif";
}

function out_menu(area) {
	tMenu = document.getElementById(area).style;
	tMenu.display = "none";
	document.getElementById("otherbtn").src="shared/img/navi05.gif";
}