function hideAll() {
    document.getElementById('popup_expertise').style.display = 'none';
    document.getElementById('popup_synergies').style.display = 'none';
    document.getElementById('popup_independance').style.display = 'none';
    document.getElementById('popup_disponibilite').style.display = 'none';
    document.getElementById('popup_vulgarisation').style.display = 'none';
    document.getElementById('popup_reactivite').style.display = 'none';
}
function show(id, ev) {

    var popup = document.getElementById('popup_' + id);

    if (popup.display == 'block') {
        return false;
    }
    else {
        hideAll();
    }

    popup.style.top = '150px';
    // popup.style.top = ((ev.layerY) ? ev.layerY : ev.offsetY) + 'px';
    popup.style.display = 'block';
    return false;
}