// global menu state
var menuReady = false;

// pre-cache menubar image pairs
if (document.images) {
    var imagesNormal = new Array();
    imagesNormal["home"] = new Image(24, 103);
    imagesNormal["home"].src = "/graphics/interface/home_up.jpg";
    imagesNormal["features"] = new Image(24, 103);
    imagesNormal["features"].src  = "/graphics/interface/features_up.jpg";
    imagesNormal["seasons"] = new Image(24, 103);
    imagesNormal["seasons"].src  = "/graphics/interface/seasons_up.jpg";
    imagesNormal["schedule"] = new Image(24, 103);
    imagesNormal["schedule"].src  = "/graphics/interface/schedule_up.jpg";
	imagesNormal["standings"] = new Image(24, 103);
    imagesNormal["standings"].src  = "/graphics/interface/standings_up.jpg";
	imagesNormal["events"] = new Image(24, 103);
    imagesNormal["events"].src  = "/graphics/interface/events_up.jpg";
	imagesNormal["links"] = new Image(24, 103);
    imagesNormal["links"].src  = "/graphics/interface/links_up.jpg";
	imagesNormal["teams"] = new Image(24, 103);
    imagesNormal["teams"].src  = "/graphics/interface/teams_up.jpg";
	imagesNormal["members"] = new Image(24, 103);
    imagesNormal["members"].src  = "/graphics/interface/members_up.jpg";

    var imagesHilite = new Array();
    imagesHilite["home"] = new Image(24, 103);
    imagesHilite["home"].src = "/graphics/interface/home_ro.jpg";
    imagesHilite["features"] = new Image(24, 103);
    imagesHilite["features"].src  = "/graphics/interface/features_ro.jpg";
    imagesHilite["seasons"] = new Image(24, 103);
	imagesHilite["seasons"].src  = "/graphics/interface/seasons_ro.jpg";
    imagesHilite["schedule"] = new Image(24, 103);
    imagesHilite["schedule"].src  = "/graphics/interface/schedule_ro.jpg";
	imagesHilite["standings"] = new Image(24, 103);
    imagesHilite["standings"].src  = "/graphics/interface/standings_ro.jpg";
	imagesHilite["events"] = new Image(24, 103);
    imagesHilite["events"].src  = "/graphics/interface/events_ro.jpg";
	imagesHilite["links"] = new Image(24, 103);
    imagesHilite["links"].src  = "/graphics/interface/links_ro.jpg";
	imagesHilite["teams"] = new Image(24, 103);
    imagesHilite["teams"].src  = "/graphics/interface/teams_ro.jpg";
	imagesHilite["members"] = new Image(24, 103);
    imagesHilite["members"].src  = "/graphics/interface/members_ro.jpg";


	var imagesDim = new Array();
    imagesDim["home"] = new Image(24, 103);
    imagesDim["home"].src = "/graphics/interface/home_dm.jpg";
    imagesDim["features"] = new Image(24, 103);
    imagesDim["features"].src  = "/graphics/interface/features_dm.jpg";
    imagesDim["seasons"] = new Image(24, 103);
	imagesDim["seasons"].src  = "/graphics/interface/seasons_dm.jpg";
    imagesDim["schedule"] = new Image(24, 103);
    imagesDim["schedule"].src  = "/graphics/interface/schedule_dm.jpg";
	imagesDim["standings"] = new Image(24, 103);
    imagesDim["standings"].src  = "/graphics/interface/standings_dm.jpg";
	imagesDim["events"] = new Image(24, 103);
    imagesDim["events"].src  = "/graphics/interface/events_dm.jpg";
	imagesDim["links"] = new Image(24, 103);
    imagesDim["links"].src  = "/graphics/interface/links_dm.jpg";
	imagesDim["teams"] = new Image(24, 103);
    imagesDim["teams"].src  = "/graphics/interface/teams_dm.jpg";
	imagesDim["members"] = new Image(24, 103);
    imagesDim["members"].src  = "/graphics/interface/members_dm.jpg";
}

function getElementStyle(elem, IEStyleProp, CSSStyleProp) {
    if (elem.currentStyle) {
        return elem.currentStyle[IEStyleProp];
    } else if (window.getComputedStyle) {
        var compStyle = window.getComputedStyle(elem, "");
        return compStyle.getPropertyValue(CSSStyleProp);
    }
    return "";
}

// carry over some critical menu style sheet attribute values
var CSSRuleValues = {menuItemHeight:"16px",
                     menuItemLineHeight:"16px",
                     menuWrapperBorderWidth:1,
                     menuWrapperPadding:3,
                     defaultBodyFontSize:"11px"
                    };

// create hash table-like lookup for menu objects with id string indexes
function makeHashes() {
    for (var i = 0; i < menus.length; i++) {
        menus[menus[i].elemId] = menus[i];
        menus[menus[i].mBarImgId] = menus[i];
    }
}

// assign menu label image event handlers
function assignLabelEvents() {
    var elem;
    for (var i = 0; i < menus.length; i++) {
        elem = document.getElementById(menus[i].mBarImgId);
        elem.onmouseover = swap;
        elem.onmouseout = swap;
    }
}

// invoked from init(), generates the menu div elements and their contents.
// all this action is invisible to user during construction
function makeMenus() {
    var menuDiv, menuItem, itemLink, mbarImg, textNode, offsetLeft, offsetTop;
    
    // determine key adjustment factors for the total height of menu divs
    
    var menuItemH = 0;
    var bodyFontSize = parseInt(getElementStyle(document.body, "fontSize", "font-size"));
    // test to see if browser's font size has been adjusted by the user
    // and that the new size registers as an applied style property
    if (bodyFontSize == parseInt(CSSRuleValues.defaultBodyFontSize)) {
        menuItemH = (parseFloat(CSSRuleValues.menuItemHeight));
    } else {
        // works nicely in Netscape 7
        menuItemH = parseInt(parseFloat(CSSRuleValues.menuItemLineHeight) * bodyFontSize);
    }
    var heightAdjust = parseInt(CSSRuleValues.menuWrapperPadding) +  parseInt(CSSRuleValues.menuWrapperBorderWidth);
	

    if (navigator.appName == "Microsoft Internet Explorer" &&  navigator.userAgent.indexOf("Win") != -1 && (typeof document.compatMode == "undefined" || document.compatMode == "BackCompat")) {
        heightAdjust = -heightAdjust;
    }
	//alert(heightAdjust);
    
    // use menus array to drive div creation loop
    for (var i = 0; i < menus.length; i++) {
        menuDiv = document.createElement("div");
        menuDiv.id = "popupmenu" + i;
        // preserve menu's ID as property of the menus array item
        menus[i].elemId = "popupmenu" + i;
        menuDiv.className = "menuWrapper";
        if (menus[i].menuItems.length > 0) {
            menuDiv.style.height = ((menuItemH * menus[i].menuItems.length) -  heightAdjust) + "px";
        } else {
            // don't display any menu div lacking menu items
            menuDiv.style.display = "none";
        }
        // define event handlers
        menuDiv.onmouseover = keepMenu;
        menuDiv.onmouseout = requestHide;

        // set stacking order in case other layers are around the page
        menuDiv.style.zIndex = 1000;
        // assemble menu item elements for inside menu div
		if(menus[i].menuItems.length > 0) {
			for (var j = 0; j < menus[i].menuItems.length; j++) {
				
				menuItem = document.createElement("div");
				menuItem.id = "popupmenuItem_" + i + "_" + j;
				menuItem.className = "menuItem";
				menuItem.onmouseover = toggleHighlight;
				menuItem.onmouseout = toggleHighlight;
				menuItem.onclick = hideMenus;
				menuItem.style.top = menuItemH * j + "px";
				itemLink = document.createElement("a");
				itemLink.href = "#";

				itemLink.onclick = navTo;
				itemLink.className = "menuItem";
				itemLink.onmouseover = toggleHighlight;
				itemLink.onmouseout = toggleHighlight;
				textNode = document.createTextNode(menus[i].menuItems[j].text);
				itemLink.appendChild(textNode);
				menuItem.appendChild(itemLink);
				menuDiv.appendChild(menuItem);
			}
		} else {
			disableButton(i);
		}
        // append each menu div to the body
        document.body.appendChild(menuDiv);
    }
    makeHashes();
    assignLabelEvents();
    // pre-position menu
    for (i = 0; i < menus.length; i++) {
        positionMenu(menus[i].elemId);
    }
    menuReady = true;
}

function disableButton(id) {
	 //alert(id)
}

// initialize global that helps manage menu hiding
var timer;

// invoked from mouseovers inside menus to cancel hide
// request from mouseout of menu bar image et al.
function keepMenu() {
    clearTimeout(timer);
}

function cancelAll() {
    keepMenu();
    menuReady = false;
}

// invoked from mouseouts to request hiding all menus
// in 1/4 second, unless cancelled
function requestHide() {
    timer = setTimeout("hideMenus()", 250);
}

// "brute force" hiding of all menus and restoration
// of normal menu bar images
function hideMenus() {
    for (var i = 0; i < menus.length; i++) {
       document.getElementById(menus[i].mBarImgId).src = menus[i].mBarImgNormal.src;
       var menu = document.getElementById(menus[i].elemId)
       menu.style.visibility = "hidden";
    }
}

// set menu position just before displaying it
function positionMenu(menuId){
    // use the menu bar image for position reference of related div
    var mBarImg = document.getElementById(menus[menuId].mBarImgId);
    var offsetTrail = mBarImg;
    var offsetLeft = 0;
    var offsetTop = 0;
    while (offsetTrail) {
        offsetLeft += offsetTrail.offsetLeft;
        offsetTop += offsetTrail.offsetTop;
        offsetTrail = offsetTrail.offsetParent;
    }
    if (navigator.userAgent.indexOf("Mac") != -1 && 
        typeof document.body.leftMargin != "undefined") {
        offsetLeft += document.body.leftMargin;
        offsetTop += document.body.topMargin;
    }
    var menuDiv = document.getElementById(menuId);
    menuDiv.style.left = offsetLeft + "px";
    menuDiv.style.top = offsetTop + mBarImg.height + "px";
}

// display a particular menu div
function showMenu(menuId) {
    if (menuReady) {
        keepMenu();
        hideMenus();
        positionMenu(menuId);
        var menu = document.getElementById(menuId);
        menu.style.visibility = "visible";
    }
}


function navTo(evt) {
    evt = (evt) ? evt : ((event) ? event : null);
    if (typeof menuReady != "undefined") {
		if (menuReady && evt) {
            var elem = (evt.target) ? evt.target : evt.srcElement;
            if (elem.nodeType == 3) {
                elem = elem.parentNode;
            }
			var item = elem.parentNode.id;
            item = item.split("_");

			if(li || !menus[parseInt(item[1],10)].restricted)
				window.location.href = menus[parseInt(item[1],10)].menuItems[parseInt(item[2],10)].href;
			else
				alert('You must log in to view the requested page.');
           
        }
    }
}

// menu bar image swapping, invoked from mouse events in menu bar
// swap style sheets for menu items during rollovers
function toggleHighlight(evt) {
    evt = (evt) ? evt : ((event) ? event : null);
    if (typeof menuReady != "undefined") {
        if (menuReady && evt) {
            var elem = (evt.target) ? evt.target : evt.srcElement;
            if (elem.nodeType == 3) {
                elem = elem.parentNode;
            }
            if (evt.type == "mouseover") {
                keepMenu();
                elem.className ="menuItemOn";
            } else {
                elem.className ="menuItem";
                requestHide();
            }
            evt.cancelBubble = true;
        }
    }
}

function swap(evt) {
    evt = (evt) ? evt : ((event) ? event : null);
    if (typeof menuReady != "undefined") {
        if (evt && (document.getElementById && document.styleSheets) && menuReady) {
            var elem = (evt.target) ? evt.target : evt.srcElement;
            if (elem.className == "menuImg") {
                if (evt.type == "mouseover") {
                    showMenu(menus[elem.id].elemId);
                    elem.src = menus[elem.id].mBarImgHilite.src;
                } else if (evt.type == "mouseout") {
                    requestHide();
                }
                evt.cancelBubble = true;
            }
        }
    }
}

// create menus only if key items are supported
function initMenus() {
    if (document.getElementById && document.styleSheets) {
        setTimeout("makeMenus()", 5);
        window.onunload=cancelAll;
    }
}