/**
 * addEvent & removeEvent -- cross-browser event handling
 * Copyright (C) 2006-2007  Dao Gottwald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Contact information:
 *   Dao Gottwald  <dao at design-noir.de>
 *
 * @version  1.2
 */

function addEvent(o, type, fn) {
  o.addEventListener(type, fn, false);
}
function removeEvent(o, type, fn) {
  o.removeEventListener(type, fn, false);
}
/*@cc_on if (!window.addEventListener) {
  var addEvent = function (o, type, fn) {
    if (!o._events) o._events = {};
    var queue = o._events[type];
    if (!queue) {
      o._events[type] = [fn];
      if (!o._events._callback)
        o._events._callback = function (e) { Event._callListeners(e, o) };
      o.attachEvent("on" + type, o._events._callback);
    } else if (Event._fnIndex(o, type, fn) == -1)
      queue.push(fn);
    else return;
    Event._mem.push([o, type, fn]);
  };
  var removeEvent = function (o, type, fn) {
    var i = Event._fnIndex(o, type, fn);
    if (i < 0) return;
    var queue = o._events[type];
    if (queue.calling) {
      delete queue[i];
      if (queue.removeListeners)
        queue.removeListeners.push(i);
      else
        queue.removeListeners = [i];
    } else
      if (queue.length == 1)
        Event._detach(o, type);
      else
        queue.splice(i, 1);
  };
  var Event = {
    AT_TARGET: 2,
    BUBBLING_PHASE: 3,
    stopPropagation: function () { this.cancelBubble = true },
    preventDefault: function () { this.returnValue = false },
    _mem: [],
    _callListeners: function (e, o) {
      e.stopPropagation = this.stopPropagation;
      e.preventDefault = this.preventDefault;
      e.currentTarget = o;
      e.target = e.srcElement;
      e.eventPhase = e.currentTarget == e.target ? this.AT_TARGET : this.BUBBLING_PHASE;
      switch (e.type) {
        case "mouseover":
          e.relatedTarget = e.fromElement;
          break;
        case "mouseout":
          e.relatedTarget = e.toElement;
      }
      var queue = o._events[e.type];
      queue.calling = true;
      for (var i = 0, l = queue.length; i < l; i++)
        if (queue[i])
          if ("handleEvent" in queue[i])
            queue[i].handleEvent(e);
          else
            queue[i].call(o,e);
      queue.calling = null;
      if (!queue.removeListeners)
        return;
      if (queue.length == queue.removeListeners.length) {
        this._detach(o, e.type);
        return;
      }
      queue.removeListeners = queue.removeListeners.sort(function(a,b){return a-b});
      var i = queue.removeListeners.length;
      while (i--)
        queue.splice(queue.removeListeners[i], 1);
      if (queue.length == 0)
        this._detach(o, e.type);
      else
        queue.removeListeners = null;
    },
    _detach: function (o, type) {
      o.detachEvent("on" + type, o._events._callback);
      delete o._events[type];
    },
    _fnIndex: function (o, type, fn) {
      var queue = o._events[type];
      if (queue)
        for (var i = 0, l = queue.length; i < l; i++)
          if (queue[i] == fn)
            return i;
      return -1;
    },
    _cleanup: function () {
      if (this._mem)      
        for (var m, i = 0; m = this._mem[i]; i++)
          if (m[1] != "unload" || m[2] == this._cleanup)
            removeEvent(m[0], m[1], m[2]);
    }
  };
  addEvent(window, "unload", Event._cleanup);
} @*/