function chkAgb () {
  if (document.formular.agb.checked == false) {
    alert("You have to read and accept the terms and conditions!");
    document.formular.agb.focus();
    return false;
  }
}

function chkFormular () {
  if (document.formular.company.value == "") {
    alert("Field \"Company\" is empty!");
    document.formular.company.focus();
    return false;
  }
  if (document.formular.fullname.value == "") {
    alert("Field \"Full Name\" is empty!");
    document.formular.fullname.focus();
    return false;
  }
  if (document.formular.address1.value == "") {
    alert("Field \"Address Line1\" is empty!");
    document.formular.address1.focus();
    return false;
  }
  if (document.formular.city.value == "") {
    alert("Field \"City\" is empty!");
    document.formular.city.focus();
    return false;
  }
  if (document.formular.zip.value.length<4) {
    alert("Your entered ZIP is to short!");
    document.formular.zip.focus();
    return false;
  }
  if (document.formular.country.value == "") {
    alert("Field \"Country\" is empty!");
    document.formular.country.focus();
    return false;
  }
  if (document.formular.email.value == "") {
    alert("Field \"E-Mail\" is empty!");
    document.formular.email.focus();
    return false;
  }
  if (document.formular.email.value.indexOf("@") == -1) {
    alert("Not a valid E-Mail address!");
    document.formular.email.focus();
    return false;
  }
  if (document.formular.vat.value == "") {
    alert("Field \"VAT no.\" is empty!");
    document.formular.vat.focus();
    return false;
  }
}