// xMenu6 r5, Copyright 2006-2007 Michael Foster (Cross-Browser.com)

// Part of X, a Cross-Browser Javascript Library, Distributed under the terms of the GNU LGPL



function xMenu6(sUlId, sMainUlClass, sSubUlClass, sLblLiClass, sItmLiClass, sLblAClass, sItmAClass, sPlusImg, sMinusImg, sImgClass, sItmPadLeft, bLblIsItm, sActiveItmId) // Object Prototype

{

  var me = this;

  xMenu6.instances[sUlId] = this;

  // Public Properties

  this.ul = xGetElementById(sUlId);

  this.pImg = sPlusImg;

  this.mImg = sMinusImg;

  // Private Event Listener

  function click(e)

  {

    if (this.xmChildUL) { // 'this' points to the A element clicked

      var s, uls = this.xmChildUL.style;

      if (uls.display != 'block') {

        s = sMinusImg;

        uls.display = 'block';

        xWalkUL(this.xmParentUL, this.xmChildUL,

          function(p,li,c,d) {

            if (c && c != d && c.style.display != 'none') {

              if (sPlusImg) {

                var a = xFirstChild(li,'a');

                xFirstChild(a,'img').src = sPlusImg;

              }

              c.style.display = 'none';

            }

            return true;

          }

        );

      }

      else {

        s = sPlusImg;

        uls.display = 'none';

      }

      if (sPlusImg) {

        xFirstChild(this,'img').src = s;

      }

      if (typeof this.blur() == 'function') {this.blur();}

      e = e || window.event;

      var t = e.target || e.srcElement;

      if (t.nodeName.toLowerCase() != 'img' && bLblIsItm) {

        return true; // click was on a label and bLblIsItm is true

      }

      return false; // click was on a label and bLblIsItm is false

    }

    return true; // click was on an item

  }

  // Constructor Code

  this.ul.className = sMainUlClass;

  xWalkUL(this.ul, null,

    function(p,li,c) {

      var liCls = sItmLiClass;

      var aCls = sItmAClass;

      var a = xFirstChild(li,'a');

      if (a) {

        var m = 'Click to toggle sub-menu';

        if (c) { // this LI is a label which precedes the submenu c

          if (sPlusImg) {

            // insert the image as the firstChild of the A element

            var i = document.createElement('img');

            i.title = m;

            a.insertBefore(i, a.firstChild);

            i.src = sPlusImg;

            i.className = sImgClass;

          }

          aCls = sLblAClass;

          liCls = sLblLiClass;

          c.className = sSubUlClass;

          c.style.display = 'none';

          a.title = bLblIsItm ? 'Click to follow link' : m;

          a.xmParentUL = p;

          a.xmChildUL = c;

          a.onclick = click;

        }

        else if (sPlusImg) { // this LI is not a label but is an item

          // if we are inserting images in label As then give A items some left padding

          a.style.paddingLeft = sItmPadLeft;

        }

        a.className = aCls;

      }

      li.className = liCls;

      return true;

    }

  );

  if (sActiveItmId) {

    this.open(sActiveItmId);

  }

  this.ul.style.visibility = 'visible';

  xAddEventListener(window, 'unload',

    function(){

      xWalkUL(me.ul, null,

        function(p,li,c) {

          var a = xFirstChild(li,'a');

          if (a && c) { a.xmParentUL = a.xmChildUL = a.onclick = null; }

          return true;

        }

      );

    }, false

  );

} // end xMenu6 prototype



// xMenu6 Public Methods

xMenu6.prototype.open = function (id)

{

  var img, ul, li, a = xGetElementById(id);

  while (a && ul != this.ul) {

    ul = a.xmChildUL;

    if (ul) {

      ul.style.display = 'block';

      if (this.pImg) {

        img = xFirstChild(a, 'img');

        if (img) {img.src = this.mImg;}

      }

    }

    li = a.parentNode; // LI

    ul = li.parentNode; // UL

    li = ul.parentNode; // LI

    a = xFirstChild(li, 'a');

  }

};



xMenu6.instances = {}; // static property