function chkFormular()
  {
if(document.FormName.NameKunde.value == "")
  {
   alert("Please enter your name!");
   document.FormName.NameKunde.select();
   document.FormName.NameKunde.focus();
   return false;
  }
if(isNaN(document.FormName.AnzahlPersonen.value) || document.FormName.AnzahlPersonen.value == "" || document.FormName.AnzahlPersonen.value > 10)
  {
   alert("Please enter the total of Passengers!");
   document.FormName.AnzahlPersonen.select();
   document.FormName.AnzahlPersonen.focus();
   return false;
  }
if(document.FormName.PassNachname.value == "")
  {
   alert("Please enter the Last Name (Passenger)!");
   document.FormName.PassNachname.select();
   document.FormName.PassNachname.focus();
   return false;
  }
if(document.FormName.PassVorname.value == "")
  {
   alert("Please enter the First Name (Passenger)!");
   document.FormName.PassVorname.select();
   document.FormName.PassVorname.focus();
   return false;
  }
if(document.FormName.PassStrasse.value == "")
  {
   alert("Please enter the street (Passenger)!");
   document.FormName.PassStrasse.select();
   document.FormName.PassStrasse.focus();
   return false;
  }
if(document.FormName.PassPlz.value == "")
  {
   alert("Please enter the Zip/Post Code (Passenger)!");
   document.FormName.PassPlz.select();
   document.FormName.PassPlz.focus();
   return false;
  }
if(document.FormName.PassOrt.value == "")
  {
   alert("Please enter the city (Passenger)!");
   document.FormName.PassOrt.select();
   document.FormName.PassOrt.focus();
   return false;
  }
if(document.FormName.PassTelPrivat.value == "")
  {
   alert("Please enter the private telephone number (Passenger)!");
   document.FormName.PassTelPrivat.select();
   document.FormName.PassTelPrivat.focus();
   return false;
  }
   var date = document.FormName.PassGeburt.value;
   var yyyy=date.substr(6,4);
   var mm=date.substr(3,2);
   var dd=date.substr(0,2);
   var pp=date.substr(2,1);
   var ppp=date.substr(5,1);
if(date.length != 10 || isNaN(dd+mm+yyyy)==1 || pp != "." || ppp != ".")
  {
   alert("Please enter the Birth date (Passenger)! Format 'DD.MM.JJJJ'.");
   document.FormName.PassGeburt.select();
   document.FormName.PassGeburt.focus();
   return false;
  }
if(document.FormName.PassGewicht.value == "" || isNaN(document.FormName.PassGewicht.value)|| document.FormName.PassGewicht.value.length >= 4)
  {
   alert("Please enter the Weight (kg)(Passenger)");
   document.FormName.PassGewicht.select();
   document.FormName.PassGewicht.focus();
   return false;
  }
if(document.FormName.GutNachname.value == "")
  {
   alert("Please enter a Last Name!");
   document.FormName.GutNachname.select();
   document.FormName.GutNachname.focus();
   return false;
  }
if(document.FormName.GutVorname.value == "")
  {
   alert("Please enter a First Name!");
   document.FormName.GutVorname.select();
   document.FormName.GutVorname.focus();
   return false;
  }
if(document.FormName.GutStrasse.value == "")
  {
   alert("Please enter the street!");
   document.FormName.GutStrasse.select();
   document.FormName.GutStrasse.focus();
   return false;
  }
if(document.FormName.GutPlz.value == "")
  {
   alert("Please enter your Zip/Post Code!");
   document.FormName.GutPlz.select();
   document.FormName.GutPlz.focus();
   return false;
  }
if(document.FormName.GutOrt.value == "")
  {
   alert("Please enter your city!");
   document.FormName.GutOrt.select();
   document.FormName.GutOrt.focus();
   return false;
  }
if(document.FormName.GutTelPrivat.value == "")
  {
   alert("Please enter your telephone number!");
   document.FormName.GutTelPrivat.select();
   document.FormName.GutTelPrivat.focus();
   return false;
  }
if ((document.FormName.GutMail.value == "") || (document.FormName.GutMail.value.indexOf('@') == -1) || (document.FormName.GutMail.value.indexOf('.') == -1) )
  {
   alert("Please enter your Email-addresse !");
   document.FormName.GutMail.select();
   document.FormName.GutMail.focus();
   return false;
  }
if(document.FormName.AGB.value != "yes" && document.FormName.AGB.value != "yes")
  {
   alert ("You read and accept the Terms and Conditions? Please enter a 'yes' !");
   document.FormName.AGB.select();
   document.FormName.AGB.focus();
   return false;
  }
if(document.FormName.ruektritt.value != "yes" && document.FormName.ruektritt.value != "yes")
  {
   alert("You read the right to withdraw from the contract according to § 355 BGB.? Please enter a 'yes' !");
   document.FormName.ruektritt.select();
   document.FormName.ruektritt.focus();
   return false;
  }
}