function submit_form(){
    if (document.contactform.nom.value == ""){ alert(lang[0]); return; }
    if (document.contactform.cognoms.value == ""){ alert(lang[1]); return; }
    if (document.contactform.mail.value == ""){ alert(lang[2]); return; }
    
    document.contactform.enviat.value = 'sent';
    document.contactform.submit();
}

function actualitzar_label(objRadio){
    if(objRadio.value == 'Currículum') document.getElementById('comment_curriculum').innerHTML=lang[4];
    else document.getElementById('comment_curriculum').innerHTML=lang[3];
}