/*
 * menuDropdown.js - implements an dropdown menu based on a HTML list
 * Original Author: Dave Lindquist (dave@gazingus.org)
 * Modifications: Erik Porter (erik.porter@hansoninc.com)
 */

var currentMenu = null;

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;
  
    actuator.onmouseover = function() {
        if (currentMenu == null) {
            this.showMenu();
        }
        else {
            currentMenu.style.visibility = "hidden";
            this.showMenu();
        }

        return false;
    }
  
    actuator.onkeypress = function() {
        if (currentMenu == null) {
            this.showMenu();
        }
        else {
			if (currentMenu != menu) {
				currentMenu.style.visibility = "hidden";
				this.showMenu();
			} else {
				closeMenu();
			}
        }

        return false;
    }
    
    actuator.onclick = function() {
        //if (currentMenu == null) {
        //    this.showMenu();
        //}
        //else {
		//	if (currentMenu != menu) {
		//		currentMenu.style.visibility = "hidden";
		//		this.showMenu();
		//	} else {
		//		closeMenu();
		//	}
        //}
        
    	//return false;
    }
    actuator.showMenu = function() {
        currentMenu = menu;
        menu.style.visibility = "visible";
    }
}

function initializeCloser(closerID) {
	var closer = document.getElementById(closerID);
	
	closer.onmouseover = function() {
        if (currentMenu != null) {
			setTimeout('closeMenu()',50);
		}
	}
}

function closeMenu() {
	if (currentMenu) {
		currentMenu.style.visibility = "hidden";
		currentMenu = null;
	}
}

function menuLoad() {
	initializeMenu("heritageMenu", "heritageTrigger");
	initializeMenu("museumMenu", "museumTrigger");
	initializeMenu("storeMenu", "storeTrigger");
	initializeMenu("infoMenu", "infoTrigger");
	initializeCloser("header");
	initializeCloser("homeTrigger");
	initializeCloser("moldingt");
	initializeCloser("contentrow");
	initializeCloser("moldingb");
	initializeCloser("footer");
}

window.onload = menuLoad;