function mouseOver(topic) {
  hideAll();
  document.getElementById(topic).className = "mapSel";
}

function mouseOut(topic) {
  document.getElementById(topic).className = "mapUnsel";
}

function hideAll() {
  document.getElementById("south").className = "mapUnsel";
  document.getElementById("southeast").className = "mapUnsel";
  document.getElementById("southwest").className = "mapUnsel";
  document.getElementById("westcentral").className = "mapUnsel";
}