<!--
function osetreni(registration_form){
if (registration_form.jmeno.value=="")
{
  alert("Please, enter your Name !");
  registration_form.jmeno.focus();
  return false;
}
else if (registration_form.prijmeni.value=="")
{
  alert("Please, enter your Surname !");
  registration_form.prijmeni.focus();
  return false;
}
else if (registration_form.ulice.value=="")
{
  alert("Please, enter Street/no. !");
  registration_form.ulice.focus();
  return false;
}
else if (registration_form.cp.value=="")
{
  alert("Please, enter no. !");
  registration_form.cp.focus();
  return false;
}
else if (registration_form.mesto.value=="")
{
  alert("Please, enter city !");
  registration_form.mesto.focus();
  return false;
}
else if (registration_form.psc.value=="")
{
  alert("Please, enter post code !");
  registration_form.psc.focus();
  return false;
}
else if (registration_form.telefon.value=="")
{
  alert("Please, enter phone number !");
  registration_form.telefon.focus();
  return false;
}
else if(registration_form.email.value=="")
{
  alert("Please, enter e-mail !");
  registration_form.email.focus();
  return false;
}
else if(window.RegExp)
{
  re=new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$");
  if(!re.test(registration_form.email.value))
  {
    alert("The entered address does not correspond with the electronic post address !");
    registration_form.email.focus();
    return false;
  }
}
else 
  return true;
}

function validate(obj_form){
if (obj_form.jmeno.value=="")
{
  alert("Please, enter your first name !");
  obj_form.jmeno.focus();
  return false;
}
else if (obj_form.prijmeni.value=="")
{
  alert("Please, enter your last name !");
  obj_form.prijmeni.focus();
  return false;
}
else if (obj_form.ulice.value=="")
{
  alert("Please, enter street !");
  obj_form.ulice.focus();
  return false;
}
else if (obj_form.cp.value=="")
{
  alert("Please, enter no. !");
  obj_form.cp.focus();
  return false;
}
else if (obj_form.mesto.value=="")
{
  alert("Please, enter city !");
  obj_form.mesto.focus();
  return false;
}
else if (obj_form.psc.value=="")
{
  alert("Please, enter post code !");
  obj_form.psc.focus();
  return false;
}
else if (obj_form.telefon.value=="")
{
  alert("Please, enter phone number !");
  obj_form.telefon.focus();
  return false;
}
else if ((!obj_form.doprava[0].checked) && (!obj_form.doprava[1].checked) && (!obj_form.doprava[2].checked))
{
  alert("Please, fill in payment !");
  obj_form.doprava[0].focus();
  return false;
}
else if(obj_form.email.value=="")
{
  alert("Please, enter e-mail !");
  obj_form.email.focus();
  return false;
}
else if(window.RegExp)
{
  re=new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$");
  if(!re.test(obj_form.email.value))
  {
    alert("The entered address does not correspond with the electronic post address !");
    obj_form.email.focus();
    return false;
  }
}
else 
  return true;
}

// kontrola formulare pro odeslani emailu
function validate_send_mail(formular)
{
  if(formular.email_news.value=="your@email.com")
  {
    alert("Nesprávný formát pole !");
    formular.email_news.focus();
    return false;
  }
  if(window.RegExp)
  {
    re=new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$");
    if(!re.test(formular.email_news.value))
    {
      alert("The entered address does not correspond with the electronic post address !");
      formular.email_news.focus();
      return false;
    }
  }
  else {
    return true;
  }
}

// kontrola formulare pro kontrolu barvy a velikosti v detailu vyrobku
function validate_detail_vyrobku(formular)
{
  if (formular.id_barva.value=="")
    {
      alert("Vyberte barvu, prosím !");
      formular.id_barva.focus();
      return false;
    }
  if(formular.id_velikost.value=="")
  {
    alert("Vyberte velikost, prosím !");
    formular.id_velikost.focus();
    return false;
  }
  else {
    return true;
  }
}

// kontrola formulare pro odeslani emailu s detailem zbozi
function validate_send_by_mail(formular)
{
  if (formular.jmeno.value=="")
  {
    alert("Please, enter Your name !");
    formular.jmeno.focus();
    return false;
  }
  if(formular.email.value=="")
  {
    alert("Nesprávný formát pole !");
    formular.email.focus();
    return false;
  }
  if(window.RegExp)
  {
    re=new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$");
    if(!re.test(formular.email.value))
    {
      alert("The entered address does not correspond with the electronic post address !");
      formular.email.focus();
      return false;
    }
  }
  else {
    return true;
  }
}
//-->