// convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

/*-----------------------------------
Determines browser
-----------------------------------*/
 // If you want to allow spoofing, take out the tests for opera and webtv.
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1));
                //&& (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
   
    var is_nav4 = (is_nav && (is_major == 4));
    var is_nav4up = (is_nav && (is_major >= 4));
    var is_navonly      = (is_nav && ((agt.indexOf(";nav") != -1) ||
                          (agt.indexOf("; nav") != -1)) );
    var is_nav6 = (is_nav && (is_major == 5));
    var is_nav6up = (is_nav && (is_major >= 5));
  
    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie3    = (is_ie && (is_major < 4));
	var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie5    = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.0")!=-1) );
    var is_ie5_5  = (is_ie && (is_major == 4) && (agt.indexOf("msie 5.5") !=-1));
    var is_ie5up  = (is_ie && !is_ie3 && !is_ie4);
    var is_ie5_5up =(is_ie && !is_ie3 && !is_ie4 && !is_ie5);
    var is_ie6    = (is_ie && (is_major == 4) && (agt.indexOf("msie 6.")!=-1) );
    var is_ie6up  = (is_ie && !is_ie3 && !is_ie4 && !is_ie5 && !is_ie5_5);

    var is_opera = (agt.indexOf("opera") != -1);
    var is_opera2 = (agt.indexOf("opera 2") != -1 || agt.indexOf("opera/2") != -1);
    var is_opera3 = (agt.indexOf("opera 3") != -1 || agt.indexOf("opera/3") != -1);
    var is_opera4 = (agt.indexOf("opera 4") != -1 || agt.indexOf("opera/4") != -1);
    var is_opera5 = (agt.indexOf("opera 5") != -1 || agt.indexOf("opera/5") != -1);
	var is_opera6 = (agt.indexOf("opera 6") != -1 || agt.indexOf("opera/6") != -1);
	var is_opera7up = (is_opera && !is_opera2 && !is_opera3 && !is_opera4 && !is_opera5 && !is_opera6);
   	/*var is_safari   = ((agt.indexOf("safari") != -1);*/
    
    // *** PLATFORM ***
    var is_win   = ( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) );
    // NOTE: On Opera 3.0, the userAgent string includes "Windows 95/NT4" on all
    //        Win32, so you can't distinguish between Win95 and WinNT.
    var is_win95 = ((agt.indexOf("win95")!=-1) || (agt.indexOf("windows 95")!=-1));
   
    var is_mac    = (agt.indexOf("mac")!=-1);
    
/*-----------------------------------
global variable initialization
-----------------------------------*/
//var is = new Is();

var swapArray = new Array();  //global that holds swap images info
var selectedImage = "getdirections";
var bWindow = null;
var layer;
var navHeight;

var layerArray = new Array();

/*Function to reload a page in NN4.7 when it is resized*/

 function handleResize() {
	if (is_nav4) {
		location.reload();
		return false;
	}
}

if (is_nav4) {
	window.captureEvents(Event.RESIZE);
	window.onresize = handleResize;
} 

/*------------------------------------------------
Pop up window function for the links to mapmuseum
------------------------------------------------*/

function pop(URL, name) {
  bWindow = window.open(URL, name,"status=0,menubar=0,width=620,height=542");
  
}

function popCustom(URL,name,options) {
  bWindow = window.open(URL,name,options);
}

/*-----------------------------------
Called from the onLoad() inside the body tag 
Creates arrays for all images and references 
to the layers involved in the navigation     
-----------------------------------*/
function initialize() {
	parseLayers(document);
	
}
function mapLayers() {
	subMapArray = new Array(getLayerRef('clientserver'),getLayerRef('crossplatform'),getLayerRef('richmapping'));
	subArrowArray = new Array('maparrow1', 'maparrow2', 'maparrow3');
	alert(subMapArray);
}
function loadGetDirectionsLayers() {
	subTextArray = new Array(getLayerRef('direto'),getLayerRef('nearby'));
}

function loadMapLayers() {
	subTextArray = new Array(getLayerRef('maptext1'), getLayerRef('maptext2'), getLayerRef('maptext3'));
	subMapArray = new Array(getLayerRef('largemap1'), getLayerRef('largemap2'), getLayerRef('largemap3'));
	subArrowArray = new Array('maparrow1', 'maparrow2', 'maparrow3');
}

function loadGateways() {
	subTextArray = new Array(getLayerRef('maptext1'), getLayerRef('maptext2'), getLayerRef('maptext3'), getLayerRef('maptext4'), getLayerRef('maptext5'));
	subMapArray = new Array(getLayerRef('largemap1'), getLayerRef('largemap2'), getLayerRef('largemap3'), getLayerRef('largemap4'), getLayerRef('largemap5'));
	subArrowArray = new Array('maparrow1', 'maparrow2', 'maparrow3', 'maparrow4', 'maparrow5');
}

                
//= Determines layer ID depending on the browser

function getLayerRef(layerID) {
	if (is_nav && is_nav6up) {
		return document.getElementById(layerID);
	} else if (is_nav) {
		return document.layers[layerID];
	} else {
		return document.all[layerID];
	}
}
/*---------------------------------------
Called from initialize()
Automatically parse every layer in document,
determining which have swappable images, 
and (NS only) create references to every 
layer in the document
---------------------------------------*/
function parseLayers(str) {
	
	
	for (var i=0; i < str.images.length; i++) {
		if (str.images[i].name != "") {
			createImageObjects(str.images[i]);
		}
	}
		
	if (is_nav && !is_nav6up) {
		for (var i=0; i < str.layers.length; i++) {
		    var layRef = str.layers[i].name;
			layerArray[layRef] = new Object();
			layerArray[layRef].layerRef = str.layers[layRef];
			parseLayers(str.layers[i].document);
		}
	}
	
}

/*----------------- NEW -----------------
Called from parseLayers()
Preloads and creates object references for swappable images
including _on state, _off state, and DOM image object path
---------------------------------------*/
function createImageObjects(imgObj) {

	var ftypeExp = /(_on|_off|_down)\.[^\.]*$/i;   // regular expression used to split the filename string
	var extExp = /\.[^\.]*$/;
	var srcString = imgObj.src;
	var extString = srcString.match(extExp)[0]; // grab the extension
	var imgRef = imgObj.name;	 
	var fnameString = srcString.replace(ftypeExp, "");
	
	swapArray[imgRef] = new Object();
	swapArray[imgRef].on = new Image();
	swapArray[imgRef].on.src = fnameString + "_on" + extString;
	swapArray[imgRef].off = new Image();
	swapArray[imgRef].off.src = fnameString + "_off" + extString;
	swapArray[imgRef].layerRef = imgObj;
	swapArray[imgRef].on2 = new Image();
	swapArray[imgRef].on2.src = fnameString + "_on2" + extString;
	swapArray[imgRef].layerRef = imgObj;
	
}

/*---------------------------------------
Called from the <a href> tag      
Swap image function for rollovers 
---------------------------------------*/
function swap(imgName, onoffon2) {
	if (swapArray[imgName] != null) {
		swapArray[imgName].layerRef.src = swapArray[imgName][onoffon2].src;
	}
}

function onClickSwap(imgName) {
	if(selectedImage != imgName) {
		swap(imgName, 'on');
		if(selectedImage != '') {
			swap(selectedImage, 'off');
		}
		selectedImage = imgName;
		return true;
	} else {
		swap(imgName, 'on');
		return false;
	}
}
// called from onMouseOver and onMouseOut
function mouseSwap(imgName, onoff) {
	if(selectedImage != imgName) {
		swap(imgName, onoff);
	}
}

/*---------------------------------------
Controls the visibility of the menu layers
---------------------------------------*/
function dropSub(layer) {
	for (i=0; i < subTextArray.length; i++) {
		(is_nav && !is_nav6up) ? subTextArray[i].visibility = "hide" : subTextArray[i].style.visibility = "hidden";
		if (subTextArray[i].id.indexOf(layer) != -1) {
			(is_nav && !is_nav6up) ? subTextArray[i].visibility = "show" : subTextArray[i].style.visibility = "visible";
		}
	}
}

function dropMap(layer) {
	for (i=0; i < subMapArray.length; i++) {
		(is_nav && !is_nav6up) ? subMapArray[i].visibility = "hide" : subMapArray[i].style.visibility = "hidden";
		if (subMapArray[i].id.indexOf(layer) != -1) {
			(is_nav && !is_nav6up) ? subMapArray[i].visibility = "show" : subMapArray[i].style.visibility = "visible";
			swap(subArrowArray[i], 'on');
		} else {
			swap(subArrowArray[i], 'off');
		}
		
		
	}
}
function changeMap(imgPath){
	//if (is.NNOLD){
		//imgPath = "../" + imgPath;
	//}
	document.largemap.src = imgPath;
	
}

//use this to collapse/expand lists
function toggle(thisList){
	if (document.getElementById(thisList).style.display =="") {
		document.getElementById(thisList).style.display = "block";
		document.getElementById(thisList + "arrow").className = "selectedCategory";
	} else {
		document.getElementById(thisList).style.display ="";
		document.getElementById(thisList + "arrow").className = "arrow";
	}
}

//use this to "show" or "hide" all the things on a collapsable list, at the same time, currently used by the FAQ
tagState = "hidden";
function toggleAllTag(tagname) {
	tagArray = document.getElementsByTagName(tagname); // produces an array of all objects in the page that are the tag you requested
	for (i = 0; i < tagArray.length; i ++) {
		if (tagState == "hidden") {
			document.getElementById(tagArray[i].id).style.display = "block";
			document.getElementById(tagArray[i].id + "arrow").className = "selectedCategory";
		} else {
			document.getElementById(tagArray[i].id).style.display ="";
			document.getElementById(tagArray[i].id + "arrow").className = "arrow";
		}
	}
	tagState = (tagState == "hidden") ? "visible" : "hidden";
}

//<![CDATA[
	function tabBox(tabToShow, totalTabs){
		// start by hiding any displayed tab content and unselecting all tabs
		for (var i = 1; i <= totalTabs; i ++){
			var tmpTab = "tab" + i;
			var tmpContent = "tabContent" + i;
			document.getElementById(tmpTab).className = "";
			document.getElementById(tmpContent).style.display = "none";
		}
		//display the selected tab and contents
		tmpTab = "tab" + tabToShow;
		tmpContent = "tabContent" + tabToShow;
		document.getElementById(tmpTab).className = "selected";
		document.getElementById(tmpContent).style.display = "block";
	}

	function hideResults(resultSet){
		document.getElementById(resultSet).style.display = "none";
	}