function changeMap()
{
  var map = document.getElementById('CompanyBigMap');
  var content = document.getElementById('About');
  
  if (content.style.display=='block')
  {
    content.style.display="none";
    map.style.display="block";
  }
  else
  {
    content.style.display ="block";
    map.style.display="none";
  }
}