function ArticleDocTabs(id) {
  this.id      = id;
  this.tabs    = null;
  this.content = null;
  this.links   = null;
  
  this.initialize = function() {
    if (this.content) return true;
    var children = document.getElementById(this.id).getElementsByTagName('div');
    for (var i = 0; i < children.length; i++) {
      if (children[i].className == 'tabs') {
        this.tabs = children[i];
      } else if (children[i].className == 'content') {
        this.content = children[i];
      } else if (children[i].className == 'links') {
        this.links = children[i];
      }
    }
  }
  
  this.show = function(name) {
    this.initialize();
    
    // select tab
    var tabs = this.tabs.getElementsByTagName('a');
    for (var i = 0; i < tabs.length; i++) {
      if (tabs[i].className.match(new RegExp('(^| )' + name + '( |$)'))) {
        if (!tabs[i].className.match(/current/)) {
          tabs[i].className = name + ' current';
        }
      } else {
        tabs[i].className = tabs[i].className.replace(' current', '');
      }
    }
    
    // select list
    var list = this.content.getElementsByTagName('ul');
    for (var i = 0; i < list.length; i++) {
      if (list[i].className == name) {
        list[i].style.display = 'block';
      } else {
        list[i].style.display = 'none';
      }
    }
    
    // select links
    var body = this.links.getElementsByTagName('div');
    for (var i = 0; i < body.length; i++) {
      if (body[i].className == name) {
        body[i].style.display = 'block';
      } else if (body[i].className != 'feed' && body[i].className != 'more') {
        body[i].style.display = 'none';
      }
    }
    
    return false;
  }
  
  this.getTab = function(name) {
  }
}