function showBubble(id) {
  document.getElementById(id).style.display="block";
  document.getElementById(id + "-arrow").style.display="block";
}
function hideBubble(id) {
  document.getElementById(id).style.display="none";
  document.getElementById(id + "-arrow").style.display="none";
}

function toggleTab() {
  if (document.getElementById('map1023').style.display == "none") {
    document.getElementById('map1023').style.display="block";
    document.getElementById('map').style.display="none";
    document.getElementById('tab1023').setAttribute("class", "tab-on");    
    document.getElementById('tab0918').setAttribute("class", "tab-off");    
  } else {
    document.getElementById('map1023').style.display="none";
    document.getElementById('map').style.display="block";  
    document.getElementById('tab1023').setAttribute("class", "tab-off");    
    document.getElementById('tab0918').setAttribute("class", "tab-on");
  }
}