function vw_health_coaching_openCity(evt, cityName) {
    var vw_health_coaching_i, vw_health_coaching_tabcontent, vw_health_coaching_tablinks;
    vw_health_coaching_tabcontent = document.getElementsByClassName("tabcontent");
    for (vw_health_coaching_i = 0; vw_health_coaching_i < vw_health_coaching_tabcontent.length; vw_health_coaching_i++) {
        vw_health_coaching_tabcontent[vw_health_coaching_i].style.display = "none";
    }
    vw_health_coaching_tablinks = document.getElementsByClassName("tablinks");
    for (vw_health_coaching_i = 0; vw_health_coaching_i < vw_health_coaching_tablinks.length; vw_health_coaching_i++) {
        vw_health_coaching_tablinks[vw_health_coaching_i].className = vw_health_coaching_tablinks[vw_health_coaching_i].className.replace(" active", "");
    }
    document.getElementById(cityName).style.display = "block";
    evt.currentTarget.className += " active";
}