// JavaScript Einblendung der Erleuchtung im iframe
var an = false;
function ruhe() {
  document.getElementById('standard').style.visibility='hidden';
  document.getElementById('ruhe').style.visibility='visible';
  document.getElementById('Film').style.width='1px';
  document.getElementById('Film').style.height='1px';
  if(an) {
    document.getElementById('Film').src='./leer.html';
  document.getElementById('Film').style.border='0';
    an = false;
    }
};
function ruheAus() {
  document.getElementById('ruhe').style.visibility='hidden';
  document.getElementById('standard').style.visibility='visible';
};
function veraenderung() {
  document.getElementById('standard').style.visibility='hidden';
  document.getElementById('bewegung').style.visibility='visible'; 
  if(!an) {  
  document.getElementById('Film').style.width='322px';
  document.getElementById('Film').style.height='182px';
  document.getElementById('Film').style.border='1px solid #823636';
  document.getElementById('Film').src='./erleuchtung.html';
    an=true;
    }
};
function veraenderungAus() {
  document.getElementById('bewegung').style.visibility='hidden'; 
  document.getElementById('standard').style.visibility='visible';
};