function check_orderform(formular)
{
  if (formular.lastname.value=="")
  {
        alert("Required field !");
        formular.lastname.focus();
        return false;
  }
  else if (formular.firstname.value=="")
  {
        alert("Required field !");
        formular.firstname.focus();
        return false;
  }
  else if (formular.company.value=="")
  {
        alert("Required field !");
        formular.company.focus();
        return false;
  }
  else if (formular.address.value=="")
  {
        alert("Required field !");
        formular.address.focus();
        return false;
  }
 	else if (formular.city.value=="")
  {
        alert("Required field !");
        formular.city.focus();
        return false;
  }
 	else if (formular.zip.value=="")
  {
        alert("Required field !");
        formular.zip.focus();
        return false;
  }
  else if (formular.country.value=="")
  {
        alert("Required field !");
        formular.country.focus();
        return false;
  }
  else if (formular.email.value!="") 
  {
    if (window.RegExp)
    {
      re = new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$");
      if (!re.test(formular.email.value))
      {
        alert("Email incorrect !");
        formular.email.focus();
        return false;
      }
    }  
  }
  else
    return true;
}