function hide_all() {
	document.getElementById('menu1').style.display = "none";
	document.getElementById('menu2').style.display = "none";
	document.getElementById('menu1').style.zIndex = "1";
	document.getElementById('menu2').style.zIndex = "1";
}

function show_menu(number) {
	var menu_name = 'menu' + number;
	var leftp = ((document.body.clientWidth / 2) - 380);
	var topp = document.getElementById('marker').offsetTop;
	ob_menu = document.getElementById(menu_name)
	hide_all();
	if ( ob_menu.innerHTML == '' ) return false;
	
	if (menu_name == 'menu1') {
			leftp = leftp + 60;
		}
	else {
			leftp = leftp + 80;		
		}
	ob_menu.style.zIndex = "30";
	ob_menu.style.display = "block";	
	ob_menu.style.left = leftp + 'px';
	ob_menu.style.top = topp + 1 + 'px'; 
}