function skryj_pole() {
if (document.getElementById("upravaselect").selected || document.getElementById("redesignselect").selected || document.getElementById("analyzaselect").selected) document.getElementById("uprava_redesign_analyza").style.display = ('block');
else document.getElementById("uprava_redesign_analyza").style.display = ('none');


if (document.getElementById("kompletwebselect").selected) document.getElementById("kompletweb").style.display = ('block');
else document.getElementById("kompletweb").style.display = ('none');


if (document.getElementById("copywritingselect").selected) document.getElementById("copywriting").style.display = ('block');
else document.getElementById("copywriting").style.display = ('none');

if (document.getElementById("korekturaselect").selected) document.getElementById("korektura").style.display = ('block');
else document.getElementById("korektura").style.display = ('none');

if (document.getElementById("grafickynavrhselect").selected) document.getElementById("grafika").style.display = ('block');
else document.getElementById("grafika").style.display = ('none');

if (document.getElementById("dotazselect").selected) document.getElementById("dotaz").style.display = ('block');
else document.getElementById("dotaz").style.display = ('none');

if (document.getElementById("nicselect").selected) document.getElementById("nicnevybrano").style.display = ('block');
else document.getElementById("nicnevybrano").style.display = ('none');
}

function zkontroluj(formular)
{
if (formular.jmeno_ura.value=="" && formular.jmeno_kompletweb.value=="" && formular.jmeno_copywriting.value=="" && formular.jmeno_korektura.value=="" && formular.jmeno_grafika.value=="" && formular.jmeno_dotaz.value=="")
    {
        alert("Nezadali jste Vaše jméno!");
        return false;
    }
   
else if (formular.mail_ura.value=="" && formular.mail_kompletweb.value=="" && formular.mail_copywriting.value=="" && formular.mail_korektura.value=="" && formular.mail_grafika.value==""  && formular.mail_dotaz.value=="")
    {
        alert("Nezadali jste kontaktní mailovou adresu!");
        return false;
    }
    else 
        return true;
}