var submenu;
var isOver = false;

function load() {
	submenu = document.getElementById('submenu');
}

function show() {
	isOver = true;
	submenu.style.display = 'block';
}

function hide() {
	isOver = false;
	setTimeout('hide_run()', 300);
}

function hide_run() {
	if(!isOver) {
		submenu.style.display = 'none';
	}
}