function open_index_window (adress) {
  new_window = window.open(adress, "Indexierung", "width=400, height=600, left=0, top=0");
  new_window.focus();
  }

function naviAnzeigen(wert){
  eval("document.getElementById('" + wert + "').style.display = 'block'");
  }

function naviAusblenden(wert){
  eval("document.getElementById('" + wert + "').style.display = 'none'");
  eval("document.getElementById('largeImg').style.display = 'block'");
  }

function naviAusblendenKomplett(){
  for(i=1;i<6;i++){
    eval("document.getElementById('navi2" + i + "').style.display = 'none'");
    }
  }