function MouseOver(pic) {
  document.getElementById(pic).src=pic+'_hi.gif';  
  if(document.getElementById("nBerlin") != null) {
    if(pic.indexOf('berlin') != -1) document.getElementById("nBerlin").style.color='#aaaaaa';
    else document.getElementById("nKremmen").style.color='#aaaaaa';
  }
  }
  function MouseOut(pic) {
  document.getElementById(pic).src=pic+'.gif';
  if(document.getElementById("nBerlin") != null) {
    if(pic.indexOf('berlin') != -1) document.getElementById("nBerlin").style.color='#464648';
    else document.getElementById("nKremmen").style.color='#464648';
  }
  }
  
  function bigImageOver(pic) {
  document.getElementById("bigImage").innerHTML = '<img src="'+pic+'">';
  document.getElementById("bigImage").style.display = 'block';
  }
  
  function bigImageOut() {
  document.getElementById("bigImage").innerHTML = '';
  document.getElementById("bigImage").style.display = 'none';
  }