active_submenu = '-1';
timer = null;
function show_sub_menu(id) {
	clearTimeout(timer)
	if (active_submenu) {
		elem = document.getElementById(active_submenu);
		if (elem) {
			elem.style.display = 'none';
			document.getElementById('left_column').style.zIndex = '9';
			document.getElementById('left_column').style.width = "412px";
		}
	}
	document.getElementById(id).style.display = 'block';
	document.getElementById('left_column').style.zIndex = '1000';
	active_submenu = id;
}	
function hide_sub_menu(id) {
	timer = setTimeout("timerHide('" + id + "')", 1000);	
}
function timerHide(id) {
	if (active_submenu != '-1') {
		document.getElementById(id).style.display = 'none';
		document.getElementById('left_column').style.zIndex = '9';
		document.getElementById('left_column').style.width = "190px";
		active_submenu = '-1';
	}
}