// mouseover preloads
var navImgOff = new Array();
var navImgOver = new Array();
var navImgOn = new Array();
if (document.images) {
    var navList = new Array(
        'services',
        'climate_solutions',
        'corporate_responsibility',
        'strategy_and_management',
        'writing',
        'about',
        'contact',
        'home'
    );
    for (var i=0; i<navList.length; i++) {
        navImgOff[navList[i]] = new Image();
        navImgOff[navList[i]].src = "/images/nav/"+navList[i]+"-off.gif";
        navImgOver[navList[i]] = new Image();
        navImgOver[navList[i]].src = "/images/nav/"+navList[i]+"-on.gif";
        navImgOn[navList[i]] = new Image();
        navImgOn[navList[i]].src = "/images/nav/"+navList[i]+"-on.gif";
    }
}

// mouseover image functions
function navOff(navName) {
    if (navName && navName.length && document.images && document['nav_'+navName]) {
        if (navName == navActive) {
            // don't turn off current page's nav link
            document['nav_'+navName].src = navImgOn[navName].src;
            if ((navActive == 'climate_solutions') ||
                (navActive == 'corporate_responsibility') ||
                (navActive == 'strategy_and_management')) {
                document['nav_services'].src = navImgOn['services'].src;
            }
        } else {
            document['nav_'+navName].src = navImgOff[navName].src;
            if ((navActive != 'climate_solutions') &&
                (navActive != 'corporate_responsibility') &&
                (navActive != 'strategy_and_management')) {
                document['nav_services'].src = navImgOff['services'].src;
            }
        }
    }
}

function navOver(navName) {
    if (navName && navName.length && document.images && document['nav_'+navName]) {
        document['nav_'+navName].src = navImgOver[navName].src;
        if ((navName == 'climate_solutions') ||
            (navName == 'corporate_responsibility') ||
            (navName == 'strategy_and_management')) {
            document['nav_services'].src = navImgOver['services'].src;
        }
    }
}

function navOn(navName) {
    if (navName && navName.length && document.images && document['nav_'+navName]) {
        document['nav_'+navName].src = navImgOn[navName].src;
        if ((navName == 'climate_solutions') ||
            (navName == 'corporate_responsibility') ||
            (navName == 'strategy_and_management')) {
            document['nav_services'].src = navImgOn['services'].src;
        }
    }
}

// obfuscate email addresses
var emailDomain = 'transforming.biz';

function emailTo(emailAddress) {
    if (!(emailAddress === null)) {
        window.location = 'mailto:'+emailAddress+'@'+emailDomain;
    }
    return false;
}