function setInput(id,standard,art) {
 var set_id = document.getElementById(id);
 if(art == "on" && set_id.value == standard)
  set_id.value = "";
 else if(set_id.value == "") 
  set_id.value = standard;
}



function checkSubmit() {

 var check_send = true; 
 
 var name    = document.buchung_form.buchung_name;
 var vorname = document.buchung_form.buchung_vorname;
 var strasse = document.buchung_form.buchung_strasse;
 var hnr     = document.buchung_form.buchung_hnr; 
 var plz     = document.buchung_form.buchung_plz;  
 var ort     = document.buchung_form.buchung_ort;  
 var email   = document.buchung_form.buchung_email;  
 var telefon = document.buchung_form.buchung_telefon;    
 
 // name
 if(name.value == "" || name.value == "Name") {
  name.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  name.style.border = "1px solid #cfcfcf"; 

 // vorname
 if(vorname.value == "" || vorname.value == "Vorname") {
  vorname.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  vorname.style.border = "1px solid #cfcfcf"; 


/*
 // strasse
 if(strasse.value == "" || strasse.value == "Straße") {
  strasse.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  strasse.style.border = "1px solid #cfcfcf"; 
  
 // hnr
 if(hnr.value == "" || hnr.value == "Hausnr.") {
  hnr.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  hnr.style.border = "1px solid #cfcfcf"; 

 // plz
 if(plz.value == "" || plz.value == "PLZ" || !Number(plz.value)) {
  plz.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  plz.style.border = "1px solid #cfcfcf"; 
*/



 // ort
 if(ort.value == "" || ort.value == "Ort") {
  ort.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  ort.style.border = "1px solid #cfcfcf"; 

 // email
 var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
 if(email.value == "" || email.value == "EMail" || (filter.test(email.value) == false)) {
  email.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  email.style.border = "1px solid #cfcfcf"; 
  
 // telefon
 if(telefon.value == "" || telefon.value == "Telefon") {
  telefon.style.border = "1px solid red";
  var check_send = false;
 } 
 else 
  telefon.style.border = "1px solid #cfcfcf";   


 if(check_send)  
  document.buchung_form.submit();
}