var clickMenu = {

  init: function() {
    clickMenu.activeMid = false;
    clickMenu.activeSub = false;
    var links = document.getElementById("menu");
    links = links.getElementsByTagName("a");
    for(var i=0; i<links.length; i++) {
      if(links[i].parentNode.parentNode.parentNode.getAttribute("id") == "topLevel") {
        //sets topLink container div to the width of the actual text
        var dim = getElementDimensions(links[i]);
        var width = dim.w + "px";
        links[i].parentNode.style.width = width;
        if(links[i].parentNode.parentNode.className != "stub") {
          Core.addEventListener(links[i], "click", clickMenu.topMenuListener);
        }
      }
      if((links[i].parentNode.parentNode.className == "midLevelHide") && (links[i].parentNode.className != "stub")) {
        Core.addEventListener(links[i], "click", clickMenu.midMenuListener);
      }
      if((links[i].parentNode.parentNode.getAttribute("id") == "subLevel") && (links[i].parentNode.className != "stub")) {
        Core.addEventListener(links[i], "click", clickMenu.subMenuListener);
      }
    }
  }, //init

  topShowMenu: function(link) {

    var closing = false;
    //check and see if own menu is open - if so close it
    var  menus = link.parentNode.getElementsByTagName("ul");
    for(var i=0; i<menus.length; i++) {
      if(Core.hasClass(menus[i],"showMid")) {
        Core.removeClass(menus[i],"showMid");
        Core.addClass(menus[i], "hide");
        closing = true;
      }
    }

    if(clickMenu.activeMid == true) {
      //close all sub and mid menus

      var menus = document.getElementById("menu");
      menus = menus.getElementsByTagName("ul");
      for(var i=0; i<menus.length; i++) {
        if(Core.hasClass(menus[i],"showMid")) {
          Core.removeClass(menus[i], "showMid");
        }
        if(Core.hasClass(menus[i],"showSub")) {
          Core.removeClass(menus[i], "showSub");
        }
      }
    }
    //open mid

    if(closing == false) {
      var upper = link.parentNode;
      for(var i=0; i<upper.childNodes.length; i++) {
        if(upper.childNodes[i].tagName == "DIV") {
          for(var j=0; j<upper.childNodes[i].childNodes.length; j++) {
            if(upper.childNodes[i].childNodes[j].tagName == "UL") {
              Core.addClass(upper.childNodes[i].childNodes[j], "showMid");
              clickMenu.activeMid = true;
            }
          }
        }
      }
    }
  }, //topShowMenu

  midShowMenu: function(link) {
    var closing = false;
    //check to see if own menu is open; if so, close it
    var  menus = link.parentNode.getElementsByTagName("ul");
    for(var i=0; i<menus.length; i++) {
      if(Core.hasClass(menus[i],"showSub")) {
        Core.removeClass(menus[i],"showSub");
        Core.addClass(menus[i], "hide");
        closing = true;
      }
    }

    if(clickMenu.activeSub == true) {
      //close all sub- and mid-menus

      var menus = document.getElementById("menu");
      menus = menus.getElementsByTagName("ul");
      for(var i=0; i<menus.length; i++) {
        if(Core.hasClass(menus[i],"showSub")) {

          Core.removeClass(menus[i], "showSub");
        }
      }
    }

    //open mid

    if(closing == false) {
      var upper = link.parentNode;
      for(var i=0; i<upper.childNodes.length; i++) {
        if(upper.childNodes[i].tagName == "UL") {
          Core.addClass(upper.childNodes[i], "showSub");
          clickMenu.activeSub = true;
        }
      }
    }
  }, //midShowMenu

  topMenuListener: function(event) {
    link = this;
    clickMenu.topShowMenu(link);
    Core.preventDefault(event);
  }, //topMenuListener

  midMenuListener: function(event) {
    link = this;
    clickMenu.midShowMenu(link);
    Core.preventDefault(event);
  }, //midMenuListener

  subMenuListener: function(event) {
    clickMenu.subShowMenu(this);
    Core.preventDefault(event);
  } //subMenuListener

}; //clickMenu

Core.start(clickMenu);