function pocetz(val) {
zmax = 128
if (val.pozdrav.value.length > zmax) {
val.pozdrav.value = val.pozdrav.value.substring(0,zmax);
rest = 0;
} else {
rest = zmax - val.pozdrav.value.length;
}
val.znak.value = rest;
}

function zkontroluj(formular)
{
	if (formular.odesilatel.value=="")
    {
        alert("Vaši adresu elektronické pošty musíte vyplnit!\nSender's address must be filled!");
        formular.odesilatel.focus();
        return false;
    }
    else if (formular.prijemce.value=="")
    {
        alert("Adresu elektronické pošty příjemce musíte vyplnit!\nReceiver's address must be filled!");
        formular.prijemce.focus();
        return false;
    }
	else if (window.RegExp)
    {
        re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$");
        if (!re.test(formular.odesilatel.value))
        {
            alert("Zadaná adresa odesilatele není správnou adresou elektronické pošty!\nSender's e-mail-address is not be valid!");
            formular.odesilatel.focus();
            return false;
        }
        else if (!re.test(formular.prijemce.value))
        {
            alert("Zadaná adresa příjemce není správnou adresou elektronické pošty!\nRecivers's e-mail-address is not be valid!");
            formular.prijemce.focus();
            return false;
        }
    }
    else 
	alert('Strpení prosím, požadavek se již odesílá...'); 
        return true;
}

function Otevri_okno() {
if(screen.width <= 640) {
pohled=window.open('','photo','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=yes,status=no,width=548,height=405,top=22,left=79')
}
if(screen.width == 800) {
pohled=window.open('','photo','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=yes,status=no,width=548,height=405,top=142,left=239')
}
if(screen.width > 800) {
pohled=window.open('','photo','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=yes,status=no,width=548,height=405,top=310,left=463')
}
pohled.focus();
}

function Otevri_okno_m() {
if(screen.width <= 640) {
mapa=window.open('mapa.htm','mapa','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=no,status=no,width=468,height=370,top=52,left=160')
}
else {
if (screen.width == 800){
mapa=window.open('mapa.htm','mapa','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=no,status=no,width=468,height=370,top=172,left=320')
}
else {
mapa=window.open('mapa.htm','mapa','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=no,status=no,width=468,height=370,top=340,left=544')
}
}
mapa.focus();
}

function Okno() {
rozp=window.open('','ro','toolbar=yes,menubar=yes,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=620,height=380,top=20,left=10');
rozp.focus();
}

function Otevri_okno_p() {
if(screen.width <= 640) {
pano=window.open('panorama.php','pano','toolbar=no,menubar=no,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=392,height=284,top=142,left=238')
}
else {
if (screen.width == 800){
pano=window.open('panorama.php','pano','toolbar=no,menubar=no,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=392,height=284,top=262,left=398')
}
else {
pano=window.open('panorama.php','pano','toolbar=no,menubar=no,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=392,height=284,top=430,left=622')
}
}
pano.focus();
}

function Okno_faq() {
if(screen.width <= 640) {
faq=window.open('','odpoved','toolbar=yes,menubar=no,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=324,height=360,top=32,left=304')
}
else {
if (screen.width == 800){
faq=window.open('','odpoved','toolbar=yes,menubar=no,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=324,height=360,top=152,left=464')
}
else {
faq=window.open('','odpoved','toolbar=yes,menubar=no,location=no,directories=no,scrollbars=yes,resizable=no,status=no,width=324,height=360,top=320,left=692')
}
}
faq.focus();
}

function Okno_info() {
info=window.open('','new_win','toolbar=yes,menubar=yes,location=yes,directories=no,scrollbars=yes,resizable=yes,status=yes,width=620,height=380,top=20,left=10');
info.focus();
}

function Okno_webcam() {
webcam=window.open('','webcam_win','toolbar=no,menubar=no,location=no,directories=no,scrollbars=no,resizable=mo,status=no,width=380,height=320,top=20,left=10');
webcam.focus();
}