function showhide(element){
 obj = document.getElementsByTagName("div");
 v = obj[element].style.display;
 if(v != 'block'){
  v = 'block';
 }
 else {
  v = 'none';
 }
 obj[element].style.display = v;
} 

function info(n,s){
 if(s == 's'){
  s = 'visible';
  d = 'block';
 }
 else{
  s = 'hidden';
  d = 'none';
 }
  obj = document.getElementsByTagName("div");
  obj['info'+n].style.visibility = s;
  obj['info'+n].style.display = d;
}