function ueberpruefeFormular(Bestellformular) {
		
	
            
      
   // if (Bestellformular.formLanguage.value == "en"){ include... else include... funktioniert NICHT. Grund: php-include im else-Fall wird in jedem Fall ausgeführt (auch wenn der if-Fall eintritt) und überschreibt php-include aus dem if-Fall. Die Variable $language kann nicht aus der aufrufenden Datei übernommen werden, so dass eine php-interne if-else-Konstruktion nicht möglich ist.
   
   
   var control_email = /^([_a-zA-Z0-9-]+)(\.[_a-zA-Z0-9-]+)*@([a-zA-Z0-9-]+\.)+([a-zA-Z]{2,4})$/;
   var control_number = /^([xX0-9-])/;
   
   
  if (Bestellformular.formName.value == "htporderform"){
     verifyMenge = true;
     verifyVorname = true;
     verifyFamilienname = true;
     verifyStrasse = true;
     verifyPlz = true;
     verifyOrt = true;
     verifyeMail = true;
     verifyBedingungen = false;
     verifyAtLeastOneNotification = false;
   }
   else if (Bestellformular.formName.value == "htporderform_step2"){
     verifyMenge = false;
     verifyVorname = false;
     verifyFamilienname = false;
     verifyStrasse = false;
     verifyPlz = false;
     verifyOrt = false;
     verifyeMail = false;
     verifyBedingungen = true;
     verifyAtLeastOneNotification = false;
   }
   
   
   if (verifyMenge){
   
    // Addition vorbereiten: In int umwandeln, Ansonsten wird "1" + "1" zu "11" und nicht zu "2" 	
    // Leer gelassene Felder sollen nicht zu NaN werden
	var menge_pro_theme = parseInt(Bestellformular.menge_pro_theme.value);
	if (isNaN(menge_pro_theme)){
	  menge_pro_theme = 0;
	}
	var menge_digifc_theme = parseInt(Bestellformular.menge_digifc_theme.value);
	if (isNaN(menge_digifc_theme)){
	  menge_digifc_theme = 0;
	}
	var menge_pro_pcr = parseInt(Bestellformular.menge_pro_pcr.value);
	if (isNaN(menge_pro_pcr)){
	  menge_pro_pcr = 0;
	}
	var menge_flashcards_pcr = parseInt(Bestellformular.menge_flashcards_pcr.value);
	if (isNaN(menge_flashcards_pcr)){
	  menge_flashcards_pcr = 0;
	}
	var menge_digifc_pcr = parseInt(Bestellformular.menge_digifc_pcr.value);
	if (isNaN(menge_digifc_pcr)){
	  menge_digifc_pcr = 0;
	}
	var menge_pro_hsk = parseInt(Bestellformular.menge_pro_hsk.value);
	if (isNaN(menge_pro_hsk)){
	  menge_pro_hsk = 0;
	}
	var menge_flashcards_hsk = parseInt(Bestellformular.menge_flashcards_hsk.value);
	if (isNaN(menge_flashcards_hsk)){
	  menge_flashcards_hsk = 0;
	}
	var menge_digifc_hsk = parseInt(Bestellformular.menge_digifc_hsk.value);
	if (isNaN(menge_digifc_hsk)){
	  menge_digifc_hsk = 0;
	}
	var menge_pro_top1000 = parseInt(Bestellformular.menge_pro_top1000.value);
	if (isNaN(menge_pro_top1000)){
	  menge_pro_top1000 = 0;
	}
	var menge_digifc_top1000 = parseInt(Bestellformular.menge_digifc_top1000.value);
	if (isNaN(menge_digifc_top1000)){
	  menge_digifc_top1000 = 0;
	}
	var menge_tcm = parseInt(Bestellformular.menge_tcm.value);
	if (isNaN(menge_tcm)){
	  menge_tcm = 0;
	}
	
	var numberOfItems = menge_pro_theme + menge_digifc_theme + menge_pro_pcr + menge_flashcards_pcr + menge_digifc_pcr + menge_pro_hsk + menge_flashcards_hsk + menge_digifc_hsk + menge_pro_top1000 + menge_digifc_top1000 + menge_tcm;
	
	
   
      
    
	if ( 
	  Bestellformular.menge_update_theme.checked == false && Bestellformular.menge_update_pcr.checked == false && Bestellformular.menge_update_hsk.checked == false && Bestellformular.menge_update_top1000.checked == false &&
	  (menge_pro_theme + menge_digifc_theme + menge_pro_pcr + menge_flashcards_pcr + menge_digifc_pcr + menge_pro_hsk + menge_flashcards_hsk + menge_digifc_hsk + menge_pro_top1000 + menge_digifc_top1000 + menge_tcm < 1 ) 
	)
	{
	  alert (unescape("You haven't ordered anything yet. Please enter a number in front of every article you would like to order."));
	  Bestellformular.menge_pro_theme.focus();
	  return false;
    }
    
    if (numberOfItems > 1000) 
    {
	  alert (unescape("You're trying to order more than 1000 items. Please check the order amounts or contact info@hantrainerpro.de ."));
	  Bestellformular.menge_pro_theme.focus();
      return false;
	}
		 
	
	if (Bestellformular.menge_pro_theme.value != "" && control_number.test(Bestellformular.menge_pro_theme.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_pro_theme.focus();
      return false;
    }
	if (Bestellformular.menge_digifc_theme.value != "" && control_number.test(Bestellformular.menge_digifc_theme.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_digifc_theme.focus();
	  return false;
	}
	
	
	
	if (Bestellformular.menge_pro_pcr.value != "" && control_number.test(Bestellformular.menge_pro_pcr.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_pro_pcr.focus();
	  return false;
	}
	
	if (Bestellformular.menge_flashcards_pcr.value != "" && control_number.test(Bestellformular.menge_flashcards_pcr.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_flashcards_pcr.focus();
      return false;
	}
	if (Bestellformular.menge_digifc_pcr.value != "" && control_number.test(Bestellformular.menge_digifc_pcr.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_digifc_pcr.focus();
	  return false;
	}
		
	  
		
		 
	if (Bestellformular.menge_pro_hsk.value != "" && control_number.test(Bestellformular.menge_pro_hsk.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_pro_hsk.focus();
	  return false;
	}
	
	if (Bestellformular.menge_flashcards_hsk.value != "" && control_number.test(Bestellformular.menge_flashcards_hsk.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_flashcards_hsk.focus();
	  return false;
	}
    if (Bestellformular.menge_digifc_hsk.value != "" && control_number.test(Bestellformular.menge_digifc_hsk.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_digifc_hsk.focus();
	  return false;
	}
		 
		 
	if (Bestellformular.menge_pro_top1000.value != "" && control_number.test(Bestellformular.menge_pro_top1000.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_pro_top1000.focus();
	  return false;
	}
	
	if (Bestellformular.menge_digifc_top1000.value != "" && control_number.test(Bestellformular.menge_digifc_top1000.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_digifc_top1000.focus();
      return false;
	}
		 
	 
	if (Bestellformular.menge_tcm.value != "" && control_number.test(Bestellformular.menge_tcm.value) == false) {
	  alert (unescape("You have to enter a number or leave this field empty."));
	  Bestellformular.menge_tcm.focus();
	  return false;
	}
  } // verifyMenge
	

  if (verifyVorname){
    
     if (Bestellformular.vorname.value == null || Bestellformular.vorname.value == "" ) {
        alert (unescape("Please enter your first name."));
        // alert ("name");
        Bestellformular.vorname.focus();
        return false;
     }
   }
   
   if (verifyFamilienname){
     if (Bestellformular.familienname.value == null || Bestellformular.familienname.value == "" ) {
        alert (unescape("Please enter your surname."));
        Bestellformular.familienname.focus();
        return false;
     }
   }
   
   if (verifyStrasse){
     if (Bestellformular.strasse.value == null || Bestellformular.strasse.value == "" ) {
        alert (unescape("Please enter the name of your street, as well as your house number."));
        Bestellformular.strasse.focus();
        return false;
     }
   }
   
   if (verifyPlz){
     if (Bestellformular.plz.value == null || Bestellformular.plz.value == "" ) {
        alert (unescape("Please enter your ZIP code!"));
        Bestellformular.plz.focus();
        return false;
     }
   }
   
   if (verifyOrt){
     if (Bestellformular.ort.value == null || Bestellformular.ort.value == "" ) {
        alert (unescape("Please enter your town!"));
        Bestellformular.ort.focus();
        return false;
     }
   }
  
  
   if (verifyeMail){
     

     if (Bestellformular.clientEmailAddress.value == null || Bestellformular.clientEmailAddress.value == "" ) {
     
        if (Bestellformular.formName.value == "htpnotification"){
          alert (unescape("Please enter your e-mail address! "));
        }
        else {
          alert (unescape("Please enter your e-mail address! If you don't own one, please enter << noemail@hantrainerpro.de >> in this field and don't forget to enter a telephone number."));
        }
        Bestellformular.clientEmailAddress.focus();
        return false;
     }
     if (control_email.test(Bestellformular.clientEmailAddress.value) == false){
  	   alert (unescape("Please enter a valid e-mail address! If you don't own one, please enter << noemail@hantrainerpro.de >> in this field and don't forget to enter a telephone number."));
  	   Bestellformular.clientEmailAddress.focus();
  	   return  false;
     }
   }

 
   if (verifyBedingungen){
     if (Bestellformular.bedingungen.checked == false){
        alert (unescape("The order cannot be processed unless you agree to the terms and conditions."));
        Bestellformular.bedingungen.focus();
        return false;
     }
   }
   
  
   
   if (verifyAtLeastOneNotification){
     if (Bestellformular.requestHtflashcardsthemeInfo.checked == false && Bestellformular.requestNextEditionInfo.checked == false && Bestellformular.requestTcmInfo.checked == false && Bestellformular.requestScrInfo.checked == false && Bestellformular.requestNewsletter.checked == false){
      alert (unescape("If you don't tick at least one box, you won't receive any notification."));
      Bestellformular.requestNextEditionInfo.focus();
      return false;
     }
   }
   

   if (Bestellformular.formName.value == "htpnotification"){
     alert (unescape("Your request is being processed. Please click %22OK%22%2C to display the confirmation page."));
   }
   /* else if (Bestellformular.formName.value == "htporderform_step2"){
     alert (unescape("Your data is being processed. Click OK to proceed."));
   }*/
	
	
  
	
	
}