// global menu state
var menuReady = false;

// pre-cache menubar image pairs
if (document.images) {
    var imagesNormal = new Array();
	imagesNormal["about"] = new Image(35, 119);
    imagesNormal["about"].src  = "../images/btn_about.gif";
    //imagesNormal["quote"] = new Image(35, 119);
    //imagesNormal["quote"].src = "../images/btn_quote.gif";
    imagesNormal["products"] = new Image(35, 119);
    imagesNormal["products"].src  = "../images/btn_products.gif";
    imagesNormal["labels"] = new Image(35, 119);
    imagesNormal["labels"].src  = "../images/btn_labels.gif";
	imagesNormal["digital"] = new Image(35, 119);
    imagesNormal["digital"].src  = "../images/btn_digital.gif";
	imagesNormal["ecommerce"] = new Image(35, 119);
    imagesNormal["ecommerce"].src  = "../images/btn_ecomm.gif";
	imagesNormal["contact"] = new Image(35, 120);
    imagesNormal["contact"].src  = "../images/btn_contact.gif";

    var imagesHilite = new Array();
    imagesHilite["about"] = new Image(35, 119);
    imagesHilite["about"].src = "../images/btn_about_h.gif";
	//imagesHilite["quote"] = new Image(35, 119);
    //imagesHilite["quote"].src = "../images/btn_quote_h.gif";
	imagesHilite["products"] = new Image(35, 119);
    imagesHilite["products"].src = "../images/btn_products_h.gif";
	imagesHilite["labels"] = new Image(35, 119);
    imagesHilite["labels"].src = "../images/btn_labels_h.gif";
	imagesHilite["digital"] = new Image(35, 119);
    imagesHilite["digital"].src = "../images/btn_digital_h.gif";
	imagesHilite["ecommerce"] = new Image(35, 119);
    imagesHilite["ecommerce"].src = "../images/btn_ecomm_h.gif";
	imagesHilite["contact"] = new Image(35, 120);
    imagesHilite["contact"].src = "../images/btn_contact_h.gif";	
}

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:"18px",
                     menuItemLineHeight:"1.6em",
                     menuWrapperBorderWidth:"1px",
                     menuWrapperPadding:"0px",
                     defaultBodyFontSize:"11px"
                    };

// specifications for menu contents and menubar image associations
var menus = new Array();
menus[0] = {mBarImgId:"menuImg_1", 
            mBarImgNormal:imagesNormal["about"],
            mBarImgHilite:imagesHilite["about"],
            menuItems:[ {text:"News", href:"../about/news.php"},
                        {text:"People", href:"../about/people.html"},
                        {text:"Testimonials", href:"../about/testimonials.html"},
						//{text:"Awards", href:"../about/awards.html"},
                        {text:"Employment opportunities", href:"../about/employmentops.html"},
                        {text:"Supplier opportunities", href:"../about/supplierops.html"},
                        {text:"International experience", href:"../about/international.html"}
                      ],
            elemId:""
           };
/*menus[0] = {mBarImgId:"menuImg_1",
            mBarImgNormal:imagesNormal["quote"],
            mBarImgHilite:imagesHilite["quote"],
            menuItems:[],
            elemId:""
           };*/
menus[1] = {mBarImgId:"menuImg_2",
            mBarImgNormal:imagesNormal["products"],
            mBarImgHilite:imagesHilite["products"],
            menuItems:[ {text:"Conventional printing", href:"../products_services/conventional.html"},
                        {text:"Digital printing", href:"../products_services/digitalprinting.html"},
                        {text:"Stock\/paper", href:"../products_services/stock.html"},
                        {text:"Quality Standards", href:"../products_services/standards.html"},
						{text:"Qantas labels", href:"../products_services/qantaslabels.html"},
						{text:"Medals", href:"../products_services/medals.html"}
                      ],
            elemId:""
           };
menus[2] = {mBarImgId:"menuImg_3", 
            mBarImgNormal:imagesNormal["labels"],
            mBarImgHilite:imagesHilite["labels"],
            menuItems:[],
            elemId:""
           };
menus[3] = {mBarImgId:"menuImg_4", 
            mBarImgNormal:imagesNormal["digital"],
            mBarImgHilite:imagesHilite["digital"],
            menuItems:[],
            elemId:""
           };
menus[4] = {mBarImgId:"menuImg_5", 
            mBarImgNormal:imagesNormal["ecommerce"],
            mBarImgHilite:imagesHilite["ecommerce"],
            menuItems:[],
            elemId:""
           };
menus[5] = {mBarImgId:"menuImg_6", 
            mBarImgNormal:imagesNormal["contact"],
            mBarImgHilite:imagesHilite["contact"],
            menuItems:[],
            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, itemBullet, 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;
    }
    
    // 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;
		// test to see which menuTitle is currently active
		pageLink = document.getElementById("menuTitle" + (i+1)).href;
		pageLinkPieces = new Array;
		pageLinkPieces = pageLink.split("/");
		pageLinkThis = pageLinkPieces[pageLinkPieces.length-2];
//alert(pageLinkThis+"/");
		imgLink = document.getElementById("menuImg_" + (i+1));						

		if (document.location.href.indexOf(pageLinkThis+"/") != -1) {
		imgLink.src = menus[i].mBarImgHilite.src;				
		}
        
        // 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 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++) {
	//get href of current element
	pageLink = document.getElementById("menuTitle" + (i+1)).href;
	pageLinkPieces = new Array;
	pageLinkPieces = pageLink.split("/");
	pageLinkThis = pageLinkPieces[pageLinkPieces.length-2];

	//if href of current element no equal to current href then hide menu image
		if (document.location.href.indexOf(pageLinkThis) ==-1) {		
       		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;
            thisLink = elem.parentNode.href						
			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;		
    }
}