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

jQuery(document).ready(function () {
    jQuery( ".tab-sec .tablinks" ).first().addClass( "active" );
});