function Kontrola ()
{
   if (document.formular.email.value == "")
   {
      document.formular.email.focus();
      alert ("Your E-Mail Address must contain a minimum of 6 characters");
      return false;
   }
   if (document.formular.password.value == "")
   {
      document.formular.password.focus();
      alert ("Your Password must contain a minimum of 5 characters");
      return false;
   }
   if (document.formular.password_again.value == "")
   {
      document.formular.password_again.focus();
      alert ("Your Password Again must contain a minimum of 5 characters");
      return false;
   }
   if (document.formular.user.value == "")
   {
      document.formular.user.focus();
      alert ("Your User Name must contain a minimum of 5 characters");
      return false;
   }
  if (document.formular.company.value == "")
   {
      document.formular.company.focus();
      alert ("Your Company Name must contain a minimum of 2 characters");
      return false;
   }
  if (document.formular.street.value == "")
   {
      document.formular.street.focus();
      alert ("Your Street Address must contain a minimum of 5 characters");
      return false;
   }
  if (document.formular.city.value == "")
   {
      document.formular.city.focus();
      alert ("Your City Name must contain a minimum of 5 characters");
      return false;
   }
  if (document.formular.zip.value == "")
   {
      document.formular.zip.focus();
      alert ("Your ZIP Code must contain a minimum of 3 characters");
      return false;
   }
  if (document.formular.country.value == "")
   {
      document.formular.country.focus();
      alert ("Please, select your Country.");
      return false;
   }

}