function change0 () {
}
 function change1 () {
    document.images['button1'].src = "/images/homeHov.png";
}
 function change2 () {
    document.images['button2'].src = "/images/servicesHov.png";
}
 function change3 () {
    document.images['button3'].src = "/images/locationHov.png";
}
 function change4 () {
    document.images['button4'].src = "/images/contactHov.png";
}

function disable0 () {
}

function disable1 () {
    document.images['button1'].src = "/images/home.png";
}

function disable2 () {
    document.images['button2'].src = "/images/services.png";
}

function disable3 () {
    document.images['button3'].src = "/images/location.png";
}

function disable4 () {
    document.images['button4'].src = "/images/contact.png";
}