function menuopen(ct){
if(ct == "area"){document.getElementById('area2').style.display='block';}
document.getElementById(ct).style.display='block';
}

function menuclose(ct){
if(ct=="area"){document.getElementById('area2').style.display='none';}
document.getElementById(ct).style.display='none';
}

function menu(ct){
v = document.all(ct).style;
  if(v.display == 'none'){
  menuopen(ct);
  }else{
  menuclose(ct);
  }
}