// JavaScript Document Reference: DHTML Cookbook page 293

//global menu state
var menuReady = false;

//pre-cache menubar imapge pairs
if (document.images) {
	var imagesNormal = new Array();
	imagesNormal["Rules"] = new Image(20,80);
	imagesNormal["Rules"].src = "Images/Golfers_Off.png"; //place location of Menu 1 off image here
	imagesNormal["Stats"] = new Image(20,80);
	imagesNormal["Stats"].src = "Images/Courses_Off.png"; //place location of Menu 2 off image here
	imagesNormal["Members Area"] = new Image(20,80);
	imagesNormal["Members Area"].src = "Images/Resourses_Off.png"; //place location of Menu 3 off image here
	
	var imagesHilite = new Array();
	imagesHilite["Rules"] = new Image(20,80);
	imagesHilite["Rules"].src = "Images/Golfers_On.png"; //place location of Menu 1 off image here
	imagesHilite["Stats"] = new Image(20,80);
	imagesHilite["Stats"].src = "Images/Courses_On.png"; //place location of Menu 2 off image here
	imagesHilite["Members Area"] = new Image(20,80);
	imagesHilite["Members Area"].src = "Images/Resourses_On.png"; //place location of Menu 3 off image here
}

function getElementStyle(elem, CSSStyleProp) {
	var styleValue, camel;
	if (elem) {
		if (document.defaultView && document.defaultView.getComputedStyle) {
			//W3C DOM Version
			var compStyle = document.defaultView.getComputedStyle(elem, "");
			styleValue = compStyle.getPropertyValue(CSSStyleProp);
		} else if (elem.currentStyle) {
			//make IE Style property camelCase name from CSS version
			var IEStyleProp = CSSStyleProp;
			var re = /-\D/;
			while (re.test(IEStyleProp)) {
				camel = IEStyleProp.match(re)[0].charAt(1).toUpperCase();
				IEStyleProp = IEStyleProp.replace(re, camel);
			}
			styleValue = elem.currentStyle[IEStyleProp];
		}
	}
	return(styleValue) ? styleValue : null;
}
// carry over some critical menu style sheet attribute values
var CSSRuleValues = {menuItemHeight:"20px",
					 menuWrapperBorderWidth:"0px",
					 menuWrapperPadding:"0px",
					 defaultBodyFontSize:"12px"
                     };
					 
//specifications for menu contents and menubar image associations
var menus = new Array();
menus[0] = {mBarImgId:"menuImg_1",
			mBarImgNormal:imagesNormal["Rules"],
			mBarImgHilite:imagesHilite["Rules"],
			menuItems:[{text:"Rules", href:"rules.php"},
					   {text:"Application", href:"application.php"},
					   {text:"Home", href:"index.php"}
					   ], //Enter the drop down Items for your menu here
			elemId:""
            };
menus[1] = {mBarImgId:"menuImg_2",
			mBarImgNormal:imagesNormal["Stats"],
			mBarImgHilite:imagesHilite["Stats"],
			menuItems:[{text:"Standings", href:"standings.php"}, //Enter the drop down items fro your menu here
					   {text:"Leaders", href:"leaders.php"},
					   {text:"Awards", href:"awards.php"},
					   {text:"Home", href:"index.php"}
					   ],
			elemId:""
            };
menus[2] = {mBarImgId:"menuImg_3",
		    mBarImgNormal:imagesNormal["Members Area"],
			mBarImgHilite:imagesHilite["Members Area"],
			menuItems:[{text:"Blog", href:"blog.php"}, //Enter the drop down items fro your menu here
					   {text:"Strategy", href:"strategy.php"},
					   {text:"Application", href:"application.php"},
					   {text:"Home", href:"index.php"}
					   ],
			elemId:""
            };
			
//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 adjustemnt factors for the total height of menu divs
	
	var menuItemH = 0;
	var bodyFontSize = parseInt(getElementStyle(document.body, "font-size"));
	//test to see if browser's font size hs 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 Mozilla
		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;
	}
	
	//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 incase other layers are around the page
		menuDiv.style.zIndex = 1000;
		
		//assemble menu item elements for inside menu div
		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 = menus[i].menuItems[j].href;
			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);
		}
		//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;
}

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

//"brute force" hiding of all menus and restoration
//of normal menu bar
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";
	}
}

//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;
		requestHide();
	}
}

addOnLoadEvent(initMenus);