function chkFormular () {
 
 
  if (document.Formular.Name.value == "") {
    document.getElementById('hidden01').style.display = 'block';
    document.Formular.Name.focus();
    return false;
  } else { document.getElementById('hidden01').style.display = 'none';}
  
 /*****************************/
  
  if (document.Formular.Strasse.value == "") {
   document.getElementById('hidden02').style.display = 'block';
    document.Formular.Strasse.focus();
    return false;
  } else { document.getElementById('hidden02').style.display = 'none';}
  
 /*****************************/
  
    if (document.Formular.PLZ.value == "") {
    document.getElementById('hidden03').style.display = 'block';
    document.Formular.PLZ.focus();
    return false;
  } else { document.getElementById('hidden03').style.display = 'none';}
  
    
  var chkZ = 1;
  for (i = 0; i < document.Formular.PLZ.value.length; ++i)
    if (document.Formular.PLZ.value.charAt(i) < "0" ||
        document.Formular.PLZ.value.charAt(i) > "9")
      chkZ = -1;
  if (chkZ == -1) {
    document.getElementById('hidden03').style.display = 'block';
    document.Formular.PLZ.focus();
    return false;
  } else { document.getElementById('hidden03').style.display = 'none';}
   
   
 /*****************************/
 
   
  if (document.Formular.Ort.value == "") {
   document.getElementById('hidden04').style.display = 'block';
    document.Formular.Ort.focus();
    return false;
  } else { document.getElementById('hidden04').style.display = 'none';}
  
  /*****************************/
  
  if (document.Formular.Mail.value == "") {
    document.getElementById('hidden05').style.display = 'block';
    document.Formular.Mail.focus();
    return false;
  } else { document.getElementById('hidden05').style.display = 'none';}
  
  
  if (document.Formular.Mail.value.indexOf("@") == -1) {
   document.getElementById('hidden05').style.display = 'block';
    document.Formular.Mail.focus();
    return false;
  } else { document.getElementById('hidden05').style.display = 'none';}

}