county=new Array()
county[0]="bartow"
county[1]="cherokee"
county[2]="clayton"
county[3]="cobb"
county[4]="coweta"
county[5]="dekalb"
county[6]="douglas"
county[7]="fayette"
county[8]="forsyth"
county[9]="fulton"
county[10]="gwinnett"
county[11]="henry"
county[12]="paulding"
county[13]="rockdale"
county[14]="spalding"
county[15]="walton"

function hideAllExcept(elm) {
for (var i = 0; i < county.length; i++) {
var layer = document.getElementById(county[i]);
if (elm!= county[i]) {
layer.style.display = "none";
}
else {
layer.style.display = "block";
}
}
}

function toggle_visibility(id) {
   var e = document.getElementById(id);
   if(e.style.display == 'block')
      e.style.display = 'none';
   else
      e.style.display = 'block';
}