var open_timer, close_timer, status = 1;

function open_menu() {
	clearTimeout(close_timer);
	open_timer=setTimeout("show_menu()",100);
}

function close_menu() {
	clearTimeout(open_timer);
	close_timer=setTimeout("hide_menu()",800);
}

function show_menu() {
	status=1;
	document.getElementById('submenu').style.display="block";
}

function hide_menu() {
	status=0;
	document.getElementById('submenu').style.display="none";
}