if (!document.getElementById)
	document.getElementById = function() { return null; }

function initializeMenu(menuId, actuatorId)
{
	var menu = document.getElementById(menuId);
	var actuator = document.getElementById(actuatorId);

	if (menu == null || actuator == null) return;

	//if (window.opera) return; // I'm too tired

	actuator.onclick = function()
	{
		var display = menu.style.display;
		this.parentNode.style.backgroundImage = (display == "block") ? "url(../buttons/plus.gif)" : "url(../buttons/minus.gif)";
		menu.style.display = (display == "block") ? "none" : "block";

		return false;
	}
}