var menuReady = false;
var images = "/images/";


if (document.images) {
    var imagesNormal = new Array();
    imagesNormal["home"] = new Image(59, 128);
    imagesNormal["home"].src = images + "homeL-top.gif";
    imagesNormal["product"] = new Image(59, 151);
    imagesNormal["product"].src  = images + "products-S.gif";
    imagesNormal["signup"] = new Image(59, 66);
    imagesNormal["signup"].src  = images + "signup-S.gif";
    imagesNormal["company"] = new Image(59, 75);
    imagesNormal["company"].src  = images + "companyL-top.gif";
    imagesNormal["support"] = new Image(59, 138);
    imagesNormal["support"].src  = images + "supportL-top.gif";

    var imagesHilite = new Array();
    imagesHilite["home"] = new Image(59, 128);
    imagesHilite["home"].src = images + "homeL-top.gif";
    imagesHilite["product"] = new Image(59, 151);
    imagesHilite["product"].src  = images + "products-S.gif";
    imagesHilite["signup"] = new Image(59, 66);
    imagesHilite["signup"].src  = images + "signup-S.gif";
    imagesHilite["company"] = new Image(59, 75);
    imagesHilite["company"].src  = images + "companyL-top.gif";
    imagesHilite["support"] = new Image(59, 138);
    imagesHilite["support"].src  = images + "supportL-top.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 "";
}

var CSSRuleValues = {menuItemHeight:"18px",
                     menuItemLineHeight:"1.4em",
                     menuWrapperBorderWidth:"2px",
                     menuWrapperPadding:"3px",
                     defaultBodyFontSize:"12px"
                    };

var menus = new Array();
menus[0] = {mBarImgId:"menuImg_1",
            mBarImgNormal:imagesNormal["home"],
            mBarImgHilite:imagesHilite["home"],
            menuItems:[],
            elemId:""
           };
menus[1] = {mBarImgId:"menuImg_2",
            mBarImgNormal:imagesNormal["product"],
            mBarImgHilite:imagesHilite["product"],
            menuItems:[ {text:"Overview", href:"overview.php"},
                        {text:"Solutions for Web Sites", href:"products.php"},
                        {text:" -  Thumbnail Service", href:"product2.php"},
                        {text:"Solutions for Web Users", href:"girafatoolbar.php"}
                      ],


            elemId:""
           };
//menus[2] = {mBarImgId:"menuImg_3",
//            mBarImgNormal:imagesNormal["signup"],
//            mBarImgHilite:imagesHilite["signup"],
//            menuItems:[ {text:"signup", href:"signup.php"}
//                      ],
//            menuItems:[],
//            elemId:""
//           };

menus[2] = {mBarImgId:"menuImg_4", 
            mBarImgNormal:imagesNormal["company"],
            mBarImgHilite:imagesHilite["company"],
            menuItems:[ {text:"About", href:"about.php"},
//                        {text:"Press Releases", href:"press.php"},
                        {text:"Management", href:"staff.php"},
//                        {text:"Jobs", href:"jobs.php"},
                        {text:"Contact", href:"contact.php"}
                      ],
            elemId:""
	   };
menus[3] = {mBarImgId:"menuImg_5", 
            mBarImgNormal:imagesNormal["support"],
            mBarImgHilite:imagesHilite["support"],
            menuItems:[ {text:"FAQ", href:"faq.php"},
			{text:"Feedback", href:"feedback.php"},
			{text:"Email Support", href:"esupport.php"}
                      ],
            elemId:""
           };

function makeHashes() {
    for (var i = 0; i < menus.length; i++) {
        menus[menus[i].elemId] = menus[i];
        menus[menus[i].mBarImgId] = menus[i];
    }
}

function assignLabelEvents() {
    var elem;
    for (var i = 0; i < menus.length; i++) {
        elem = document.getElementById(menus[i].mBarImgId);
        elem.onmouseover = swap;
        elem.onmouseout = swap;
    }
}

function makeMenus() {
    var menuDiv, menuItem, itemLink, mbarImg, textNode, offsetLeft, offsetTop;
    var menuItemH = 0;
    var bodyFontSizeString = getElementStyle(document.body, "fontSize", "font-size");
    var bodyFontSize = parseInt(bodyFontSizeString);
    if (bodyFontSizeString == "" || bodyFontSize == parseInt(CSSRuleValues.defaultBodyFontSize)) {
        menuItemH = (parseFloat(CSSRuleValues.menuItemHeight));
    } else {
        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;
    }
    for (var i = 0; i < menus.length; i++) {
        menuDiv = document.createElement("div");
        menuDiv.id = "popupmenu" + i;
        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 {
            menuDiv.style.display = "none";
        }
        menuDiv.onmouseover = keepMenu;
        menuDiv.onmouseout = requestHide;
        menuDiv.style.zIndex = 1000;
        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);
        }
        document.body.appendChild(menuDiv);
    }
    makeHashes();
    assignLabelEvents();
    for (i = 0; i < menus.length; i++) {
        positionMenu(menus[i].elemId);
    }
    menuReady = true;
}

var timer;

function keepMenu() {
    clearTimeout(timer);
}

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

function requestHide() {
    timer = setTimeout("hideMenus()", 250);
}

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";
    }
}

function positionMenu(menuId){
    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";
}

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

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 && 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;
            }
        }
    }
}

function initMenus() {
    if (document.getElementById) {
	if (navigator.appName != "Microsoft Internet Explorer" || navigator.userAgent.indexOf("Mac") == -1) {
	    setTimeout("makeMenus()", 5);
	    window.onunload=cancelAll;
	}
    }
}