function hideShow(sId)
{
  var arrAllIds = new Array("Cincinatti", "Hattiesburg", "Jackson", "Online");

  var k=arrAllIds.length;

  for(i=0; i<k;i++)
  {
    if(document.getElementById(arrAllIds[i]))
    {
      if(arrAllIds[i] == sId)
      {
        document.getElementById(arrAllIds[i]).style.display = "";
      }
      else
      {
        document.getElementById(arrAllIds[i]).style.display = "none";
      }
    }
  }
}

<!--
function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

function MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}
//-->