function menu_toggle(subs){
  if($(subs[0]).style.display == 'block'){
    for(var i=0; i<subs.length; i++){
      $(subs[i]).style.display = 'none';
    }
  }else{
    var all_subs = $$('.sub-item','.sub-text','.sub-heading','.sub-no-indent','.sub-sub-item');
    for(var i=0; i<all_subs.length; i++){
      all_subs[i].style.display = 'none';
    }
    for(var i=0; i<subs.length; i++){
      $(subs[i]).style.display = 'block';
    }
  }
}

function submenu_toggle(subs) {
  if($(subs[0]).style.display == 'block'){
    for(var i=0; i<subs.length; i++){
      $(subs[i]).style.display = 'none';
    }
  }else{
    var all_subs = $$('.sub-sub-item');
    for(var i=0; i<all_subs.length; i++){
      all_subs[i].style.display = 'none';
    }
    for(var i=0; i<subs.length; i++){
      $(subs[i]).style.display = 'block';
    }
  }
}

function popup(issue){
  var url = null;
  if(issue == 4){
    url = 'viewer_rand.php?i='+issue+'&p=0';
  }else{
    url = 'viewer.php?i='+issue+'&p=c';
  }
	var popup  = window.open(url, 'viewer', 
    'scrollbars=no,titlebar=no,location=no,status=no,toolbar=no,resizable=no,width=666px,height=560');
}