/*
 * 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");
	MM_preloadImages('images/home/heritage/heritage_f2.jpg');MM_preloadImages('images/home/heritage/heritage_f2.jpg');
	MM_preloadImages('images/home/heritage/heritage_f2.jpg');MM_preloadImages('images/home/museum/museum_f2.jpg');
	MM_preloadImages('images/home/heritage/heritage_f2.jpg');MM_preloadImages('images/home/store_f2.jpg');
	MM_preloadImages('images/home/heritage/heritage_f2.jpg');MM_preloadImages('images/home/info/info_f2.jpg');
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}
function MM_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}
function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_preloadImages() { //v3.0
 var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
   var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
   if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

window.onload = menuLoad;