var cur_article = 0;

function toggle_display(n)
{
  if (cur_article > 0)
  {
    obj = document.getElementById('desc_' + cur_article);
	obj.className = "hide";
	obj = document.getElementById('spa_' + cur_article);
	obj.style.listStyleImage = 'url(asset/bullet.gif)';
  }
  
  if (cur_article != n)
  {
    cur_article = n;
    obj = document.getElementById('desc_' + cur_article);
    obj.className = "show";
    obj = document.getElementById('spa_' + cur_article);
    obj.style.listStyleImage = 'url(asset/bullet_up.gif)';
  }
  else
    cur_article = 0;
}