var wait_time = 5;
var menu_item = null;
var menu_header = null;
var expire = null;


function open_menu(id, header)
{	
	cancel_expire_menu();

	if(menu_item) { 
		menu_item.style.visibility = 'hidden';
		if(menu_header) { 
			menu_header.style.backgroundColor = '#E6E6E6';	 //orange
			menu_header.style.fontSize = '101%';		
		}
	}

	menu_item = document.getElementById(id);
	menu_item.style.visibility = 'visible';

}

function expire_menu()
{
	expire = window.setTimeout(close_menu, wait_time);
}

function close_menu()
{
	if(menu_item) {
		menu_item.style.visibility = 'hidden';
	}
	if(menu_header) {
		menu_header.style.backgroundColor = '#E6E6E6';	
		menu_header.style.fontSize = '101%';
	}	
}

function cancel_expire_menu(id)
{
	if(expire) {
		window.clearTimeout(expire);
		expire = null;
	}
	if(id) { 
		menu_header = document.getElementById(id);
		menu_header.style.backgroundColor = "#B5CDE9";
		menu_header.style.fontSize = '100%';
	}
}