function obj(name)
{
  return document.getElementById(name);
}


function menu_expand(category)
{
  var expandable_menus = ["ub_students"];

  for (i=0; i<expandable_menus.length; i++)
  {
    var c = new obj(expandable_menus[i]);
    c.style.display = "none";
  }  

  category = new obj(category);
  category.style.display = "block";
}

function initial_expand()
{
  current_path = document.location + "";
  current_path = current_path.replace(/^http:\/\/[^\/]+\//,"");
  current_path = current_path.replace(/\/$/,"");
  dirs = current_path.split("/");

  menu_expand(dirs[0]);
}