flag = false;
function treeMenu(tName) {
  tMenu = document.all[tName].style;
  if(tMenu.display == 'none') tMenu.display = "block";
  else tMenu.display = "none";
}

flag = false;
function freeMenu(fName) {
  fMenu = document.all[fName].style;
  if(fMenu.display == 'block') fMenu.display = "none";
  else fMenu.display = "block";
}