//---------------------- 
  // form pre- proccessing
  //----------------------
  function chkFormular () {
    if (document.Formular.lastName.value == "") {
      alert("Please enter your last name!");
      document.Formular.lastName.focus();
      return false;
    }
    if (document.Formular.firstName.value == "") {
      alert("Please enter your first name!");
      document.Formular.firstName.focus();
      return false;
    }
    if (document.Formular.address.value == "") {
      alert("Please enter your address!");
      document.Formular.address.focus();
      return false;
    }
    if (document.Formular.city.value == "") {
      alert("Please enter your city name!");
      document.Formular.city.focus();
      return false;
    }
    if (document.Formular.zip.value == "") {
      alert("Please enter your zip code!");
      document.Formular.zip.focus();
      return false;      
    }   
    var var_zip = 1;
    for (i = 0; i < document.Formular.zip.value.length; ++i)
      if (document.Formular.zip.value.charAt(i) < "0" ||
          document.Formular.zip.value.charAt(i) > "9")
        var_zip = -1;
    if (var_zip == -1) {
      alert("The Zip code needs to be a number");
      document.Formular.Alter.focus();
      return false;
    }     
    if (document.Formular.email.value.indexOf("@") == -1) {
      alert("This is not a email address!");
      document.Formular.email.focus();
      return false;
    }	 
    if (document.Formular.phoneNr.value == "") {
      alert("Please enter a phone number!");
      document.Formular.phoneNr.focus();
      return false;
    }
    var var_phoneNr = 1;
    for (i = 0; i < document.Formular.phoneNr.value.length; ++i)
      if (document.Formular.phoneNr.value.charAt(i) < "0" ||
          document.Formular.phoneNr.value.charAt(i) > "9")
        var_phoneNr = -1;
    if (var_phoneNr == -1) {
      alert("Phone number needs consist of numbers!");
      document.Formular.phoneNr.focus();
      return false;
    }    
    if (document.Formular.emergencyContact.value == "") {
      alert("Please enter a emergency contact!");
      document.Formular.emergencyContact.focus();
      return false;
    }    
    var var_emergencyPhoneNr = 1;
    for (i = 0; i < document.Formular.emergencyPhoneNr.value.length; ++i)
      if (document.Formular.emergencyPhoneNr.value.charAt(i) < "0" ||
          document.Formular.emergencyPhoneNr.value.charAt(i) > "9")
        var_emergencyPhoneNr = -1;
    if (var_emergencyPhoneNr == -1) {
      alert("Emergency phone number needs to consist of numbers!");
      document.Formular.emergencyPhoneNr.focus();
      return false;
    } 
    if (document.Formular.USHPANr.value == "") {
      alert("Please enter a USHPA#!");
      document.Formular.USHPANr.focus();
      return false;
    }    
    var var_USHPANr = 1;
    for (i = 0; i < document.Formular.USHPANr.value.length; ++i)
      if (document.Formular.USHPANr.value.charAt(i) < "0" ||
          document.Formular.USHPANr.value.charAt(i) > "9")
        var_USHPANr = -1;
    if (var_USHPANr == -1) {
      alert("Please enter your USHPA#!");
      document.Formular.USHPANr.focus();
      return false;
    }
    if (document.Formular.flyHours.value == "") {
      alert("Please enter your your amount of flying hours!");
      document.Formular.flyHours.focus();
      return false;
    } 
	var var_flyHours = 1;
    for (i = 0; i < document.Formular.flyHours.value.length; ++i)
      if (document.Formular.flyHours.value.charAt(i) < "0" ||
          document.Formular.flyHours.value.charAt(i) > "9")
        var_flyHours = -1;
    if (var_flyHours == -1) {
      alert("Flying hours are in hours!");
      document.Formular.flyHours.focus();
      return false;
    } 
	if (document.Formular.yourName1.value == "") {
      alert("Please enter! your name");
      document.Formular.yourName1.focus();
      return false;
    } 
	if (document.Formular.checkbox1.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox1.focus();
      return false;
    }
	if (document.Formular.checkbox2.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox2.focus();
      return false;
    }
	if (document.Formular.checkbox3.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox3.focus();
      return false;
    }
	if (document.Formular.checkbox4.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox4.focus();
      return false;
    }
	if (document.Formular.checkbox5.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox5.focus();
      return false;
    }
	if (document.Formular.checkbox6.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox6.focus();
      return false;
    }
	if (document.Formular.checkbox7.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox7.focus();
      return false;
    }
	if (document.Formular.checkbox8.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox8.focus();
      return false;
    }
	if (document.Formular.checkbox9.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox9.focus();
      return false;
    }
	if (document.Formular.checkbox10.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox10.focus();
      return false;
    }
	if (document.Formular.checkbox11.checked == false) {
      alert("You must agree to this term!");
      document.Formular.checkbox11.focus();
      return false;
    }			
    if (document.Formular.signature.value == "") {
      alert("Please enter your signature!");
      document.Formular.signature.focus();
      return false;
    }
	
    return true;
  }