function trustButtonOnMouseOver() {
    var ctl = document.getElementById('buttonTrust');
    ctl.className = 'ButtonTrust btHighlight';
}

function trustButtonOnMouseOut() {
    var ctl = document.getElementById('buttonTrust');
    ctl.className = 'ButtonTrust';
}

function instituteButtonOnMouseOver() {
    var ctl = document.getElementById('buttonInstitute');
    ctl.className = 'ButtonInstitute biHighlight';
}

function instituteButtonOnMouseOut() {
    var ctl = document.getElementById('buttonInstitute');
    ctl.className = 'ButtonInstitute';
}

function programmesButtonOnMouseOver() {
    var ctl = document.getElementById('buttonProgrammes');
    ctl.className = 'ButtonProgrammes bpHighlight';
}

function programmesButtonOnMouseOut() {
    var ctl = document.getElementById('buttonProgrammes');
    ctl.className = 'ButtonProgrammes';
}

function newsletterSubscribe() {
    var ctl = document.getElementById('subscriptionAction');
    ctl.value = 'S';
}

function newsletterUnsubscribe() {
    var ctl = document.getElementById('subscriptionAction');
    ctl.value = 'U';
}

function subscribeButtonHighlight(btn) {
    btn.className = 'SubscribeButtonHighlight';
}

function subscribeButtonNormal(btn) {
    btn.className = 'SubscribeButton';
}

function unsubscribeButtonHighlight(btn) {
    btn.className = 'UnsubscribeButtonHighlight';
}

function unsubscribeButtonNormal(btn) {
    btn.className = 'UnsubscribeButton';
}