// the currently shown sub menu
var menu = 0;

function hideMenu () {
	if (menu != 0) {
		try {
			document.getElementById ('subif' + menu).style.display = 'none';
		} catch (e) {}
		document.getElementById ('sub' + menu).style.display = 'none';
		menu = 0;
	}
}

function showMenu (number) {
	hideMenu();
	document.getElementById ('sub' + number).style.display = 'block';
	try {
		document.getElementById ('subif' + number).style.width = document.getElementById ('sub' + number).offsetWidth + 'px';
		document.getElementById ('subif' + number).style.height = document.getElementById ('sub' + number).offsetHeight + 'px';
		document.getElementById ('subif' + number).style.display = 'block';
	} catch (e) {}
	menu = number;
}

function showButtons () {
try {
    for (iframe = 1; iframe < 10; ++iframe) {
        try {
	    document.getElementById ('if' + iframe).style.display = 'none';
	    document.getElementById ('if' + iframe).style.display = 'block';
	} catch (e) {}
    }
} catch (e) {}
}

window.onload = showButtons;
document.onclick = hideMenu;

setInterval (showButtons, 5000);