function getKundennummerText() {
  if (document.getElementById("username").value=="") {
    document.getElementById("username").value="Ihre Kundennummer";
  }
}


function deleteKundennummerText() {
  if (document.getElementById("username").value=="Ihre Kundennummer") {
    document.getElementById("username").value="";
  }
}


function getPasswortText() {
  if (document.getElementById("password").value=="") {
    document.getElementById("password").value="**********";
  }
}


function deletePasswortText() {
  if (document.getElementById("password").value=="**********") {
    document.getElementById("password").value="";
  }
}