/* $Id: index.js,v 1.1 2009/06/21 08:49:56 rs Exp $ */

window.onload = function () {
  document.getElementById('page1_link').onclick = function() {toggle('page2');};
  document.getElementById('page2_link').onclick = function() {toggle('page2');};
  document.getElementById('page3_link').onclick = function() {toggle('page3');};
  document.getElementById('impressum').onclick = function() {toggle('page3');};
}

function toggle(id) {
  if (document.getElementById(id).style.display == 'none' || document.getElementById(id).style.display == '') {
    document.getElementById(id).style.display = 'block';
  } else {
    document.getElementById(id).style.display = 'none';
  }
}