/************************************************************************************************************
Slide down menu
Copyright (C) October 2005  DTHMLGoodies.com, Alf Magne Kalleland

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

Dhtmlgoodies.com., hereby disclaims all copyright interest in this script
written by Alf Magne Kalleland.

Alf Magne Kalleland, 2010
Owner of DHTMLgoodies.com

************************************************************************************************************/
var expandFirstItemAutomatically = false;	// Expand first menu item automatically ?
var initMenuIdToExpand = false;	// Id of menu item that should be initially expanded. the id is defined in the <li> tag.
var expandMenuItemByUrl = true;	// Menu will automatically expand by url - i.e. if the href of the menu item is in the current location, it will expand
var moveTime = 50;
 
 
var initialMenuItemAlwaysExpanded = true;	// NOT IMPLEMENTED YET
 
var dhtmlgoodies_slmenuObj;
var divToScroll = false;
var ulToScroll = false;
var divCounter = 1;
var otherDivsToScroll = new Array();
var divToHide = false;
var parentDivToHide = new Array();
var ulToHide = false;
var offsetOpera = 0;
var executeMoveTime=0;
if(navigator.userAgent.indexOf('Opera')>=0)offsetOpera=1;
var slideMenuHeightOfCurrentBox = 0;
var objectsToExpand = new Array();
var initExpandIndex = 0;
var alwaysExpanedItems = new Array();
 
var dg_activeItem = null;
 
function popMenusToShow()
{
  var obj = divToScroll;
  var endArray = new Array();
  while(obj && obj.tagName!='BODY'){
    if(obj.tagName=='DIV' && obj.id.indexOf('slideDiv')>=0)
    {
      var objFound = -1;
      for(var no=0;no<otherDivsToScroll.length;no++)
      {
        if(otherDivsToScroll[no]==obj)
          objFound = no;
      }
      if(objFound>=0)
        otherDivsToScroll.splice(objFound,1);
    }
    obj = obj.parentNode;
  }
}

function hideSubMenu(e,inputObj)
{
  if (!divToScroll)
  {
    otherDivsToScroll[0]=this.parentNode.getElementsByTagName('DIV')[0]
    autoHideMenus();
    hidingInProcess = true;
    this.onclick=showSubMenu;
  }
}
function showSubMenu(e,inputObj)
{
  //if (!otherDivsToScroll || otherDivsToScroll.length>0)
  //  return false;

	if(this && this.tagName)
    inputObj = this.parentNode;
 
	if(inputObj && inputObj.tagName=='LI')
  {
		divToScroll = inputObj.getElementsByTagName('DIV')[0];
		for(var no=0;no<otherDivsToScroll.length;no++)
    {
			if(otherDivsToScroll[no]==divToScroll)
        return false;
		}
	}
	hidingInProcess = false;
	if(otherDivsToScroll.length>0)
  {
		if(divToScroll)
    {
			if(otherDivsToScroll.length>0)
        popMenusToShow();

			if(otherDivsToScroll.length>0)
      {
				autoHideMenus();
				hidingInProcess = true;
			}
		}
	}

	if(divToScroll && !hidingInProcess)
  {
		divToScroll.style.display='';
		otherDivsToScroll.length = 0;
		otherDivToScroll = divToScroll.parentNode;
		otherDivsToScroll.push(divToScroll);
		while(otherDivToScroll && otherDivToScroll.tagName!='BODY')
    {
			if(otherDivToScroll.tagName=='DIV' && otherDivToScroll.id.indexOf('slideDiv')>=0)
				otherDivsToScroll.push(otherDivToScroll);

      otherDivToScroll = otherDivToScroll.parentNode;
		}
		ulToScroll = divToScroll.getElementsByTagName('UL')[0];
		if(divToScroll.style.height.replace('px','')/1<=1)
      scrollDownSub();
	}
 
 
	if(e || inputObj)
  {
 
		if(dg_activeItem)
      dg_activeItem.className = dg_activeItem.className.replace('activeItem','');

		var aTags = inputObj.getElementsByTagName('A');
		if(aTags.length>0)
    {
			aTags[0].className = aTags[0].className + ' activeItem';
			dg_activeItem = aTags[0];
		}
	}

//  this.onclick=hideSubMenu;
  return false;
}

function autoHideMenus()
{
	if(otherDivsToScroll.length>0)
  {
		divToHide = otherDivsToScroll[otherDivsToScroll.length-1];
		parentDivToHide.length=0;
		var obj = divToHide.parentNode.parentNode.parentNode;
		while(obj && obj.tagName=='DIV')
    {
			if(obj.id.indexOf('slideDiv')>=0)parentDivToHide.push(obj);
			obj = obj.parentNode.parentNode.parentNode;
		}

    var tmpHeight = (divToHide.style.height.replace('px','')/1 - slideMenuHeightOfCurrentBox);
		if(tmpHeight<0)
      tmpHeight=0;
		
    if(slideMenuHeightOfCurrentBox)
      divToHide.style.height = tmpHeight  + 'px';
		
    ulToHide = divToHide.getElementsByTagName('UL')[0];
    slideMenuHeightOfCurrentBox = ulToHide.offsetHeight;
    scrollUpMenu();
	}
  else
  {
		slideMenuHeightOfCurrentBox = 0;
		showSubMenu();
	}
}

function scrollUpMenu()
{ 
  for  (var no=0;no<divToHide.getElementsByTagName('A').length ; no++)
  {
    if(divToHide.getElementsByTagName('A')[no].className.indexOf("selecteditem")>=0)
    {
      otherDivsToScroll.length-=1;
      slideMenuHeightOfCurrentBox = 0;
      showSubMenu();
      return true;
    }
  }
  var height = divToHide.offsetHeight;
  height-=15;
  if(height<0)
    height=0;
  divToHide.style.height = height + 'px';
 
  for(var no=0;no<parentDivToHide.length;no++)
  {
    parentDivToHide[no].style.height = parentDivToHide[no].getElementsByTagName('UL')[0].offsetHeight + 'px';
  }
  if(height>0)
    setTimeout('scrollUpMenu()',25);
  else
  {
    divToHide.style.display='none';
    otherDivsToScroll.length = otherDivsToScroll.length-1;
    autoHideMenus();
  }
}

function scrollDownSub()
{
	if(divToScroll)
  {
		var height = divToScroll.offsetHeight/1;
		var offsetMove =Math.min(15,(ulToScroll.offsetHeight - height));
		height = height +offsetMove ;
		divToScroll.style.height = height + 'px';
 
		for(var no=1;no<otherDivsToScroll.length;no++)
    {
			var tmpHeight = otherDivsToScroll[no].offsetHeight/1 + offsetMove;
			otherDivsToScroll[no].style.height = tmpHeight + 'px';
		}

		if(height<ulToScroll.offsetHeight)
    {
      if (executeMoveTime==0)
        scrollDownSub();
      else
        setTimeout('scrollDownSub()',executeMoveTime);
    }
    else
    {
			divToScroll = false;
			ulToScroll = false;
			if(objectsToExpand.length>0 && initExpandIndex<(objectsToExpand.length-1))
      {
				initExpandIndex++;
 
				showSubMenu(false,objectsToExpand[initExpandIndex]);
			}
		}
	}
  return false;
}
 
function initSubItems(inputObj,currentDepth)
{
	divCounter++;
	var div = document.createElement('DIV');	// Creating new div
	div.style.overflow = 'hidden';
	div.style.position = 'relative';
	div.style.display='none';
	div.style.height = '1px';
	div.id = 'slideDiv' + divCounter;
	div.className = 'slideMenuDiv' + currentDepth;
	inputObj.parentNode.appendChild(div);	// Appending DIV as child element of <LI> that is parent of input <UL>
	div.appendChild(inputObj);	// Appending <UL> to the div
	var menuItem = inputObj.getElementsByTagName('LI')[0];
	while(menuItem)
  {
		if(menuItem.tagName=='LI')
    {
			var aTag = menuItem.getElementsByTagName('A')[0];
			aTag.className+=' slMenuItemDepth'+currentDepth;
			var subUl = menuItem.getElementsByTagName('UL');
			if(subUl.length>0)
      {
        if ((aTag.href && aTag.href.indexOf("#")>=0) || aTag.href=="")
        {
          aTag.href = "javascript:void(0)";
          aTag.onclick = showSubMenu;
        }
        initSubItems(subUl[0],currentDepth+1);
      }
      else
        aTag.id="nosubitem";
		}
		menuItem = menuItem.nextSibling;
	}
}
 
function initSlideDownMenu()
{
	dhtmlgoodies_slmenuObj = document.getElementById('mnu');
	dhtmlgoodies_slmenuObj.style.visibility='visible';
	var mainUl = dhtmlgoodies_slmenuObj.getElementsByTagName('UL')[0];
	var mainMenuItem = mainUl.getElementsByTagName('LI')[0];
	mainItemCounter = 1;
	while(mainMenuItem)
  {
		if(mainMenuItem.tagName=='LI')
    {
      var aTag = mainMenuItem.getElementsByTagName('A')[0];
			aTag.className+=' slMenuItemDepth1';
			var subUl = mainMenuItem.getElementsByTagName('UL');
			if(subUl.length>0)
      {
				mainMenuItem.id = 'mainMenuItem' + mainItemCounter;
        aTag.onclick = showSubMenu;
				aTag.href = "javascript:void(0)";
				initSubItems(subUl[0],2);
				mainItemCounter++;
			}
		}
		mainMenuItem = mainMenuItem.nextSibling;
	}
 
	if(location.search.indexOf('mainMenuItemToSlide')>=0)
  {
		var items = location.search.split('&');
		for(var no=0;no<items.length;no++)
    {
			if(items[no].indexOf('mainMenuItemToSlide')>=0)
      {
				values = items[no].split('=');
				showSubMenu(false,document.getElementById('mainMenuItem' + values[1]));
				initMenuIdToExpand = false;
			}
		}
	}
  else if(expandFirstItemAutomatically>0)
  {
		if(document.getElementById('mainMenuItem' + expandFirstItemAutomatically))
    {
			showSubMenu(false,document.getElementById('mainMenuItem' + expandFirstItemAutomatically));
			initMenuIdToExpand = false;
		}
	}
 
	if(expandMenuItemByUrl)
	{
		var aTags = dhtmlgoodies_slmenuObj.getElementsByTagName('A');
		for(var no=0;no<aTags.length;no++)
    {
			var hrefToCheckOn = aTags[no].href;
      //alert(hrefToCheckOn+" = "+location.href);
			if(location.href.indexOf(hrefToCheckOn)>=0 && hrefToCheckOn.indexOf('#')<hrefToCheckOn.length-1)
      {
				initMenuIdToExpand = false;
				var obj = aTags[no].parentNode;
        aTags[no].className=aTags[no].className+" selecteditem";
        aTags[no].href="javascript:void(0)";
        aTags[no].onclick = showSubMenu;
				while(obj && obj.id!='mnu')
        {
					if(obj.tagName=='LI')
          {
						var subUl = obj.getElementsByTagName('UL');
						if(initialMenuItemAlwaysExpanded)
            {
              alwaysExpanedItems[obj.parentNode] = true;
              obj.getElementsByTagName('A')[0].className+=" selecteditem";
            }

						if(subUl.length>0)
              objectsToExpand.unshift(obj);
					}
					obj = obj.parentNode;
				}
				showSubMenu(false,objectsToExpand[0]);
				break;
			}
		}
	}
 
	if(initMenuIdToExpand)
	{
		objectsToExpand = new Array();
		var obj = document.getElementById(initMenuIdToExpand)
		while(obj && obj.id!='mnu')
    {
			if(obj.tagName=='LI')
      {
				var subUl = obj.getElementsByTagName('UL');
				if(initialMenuItemAlwaysExpanded)alwaysExpanedItems[obj.parentNode] = true;
				if(subUl.length>0)
          objectsToExpand.unshift(obj);
			}
			obj = obj.parentNode;
		}
 
		showSubMenu(false,objectsToExpand[0]);
 
	}

  executeMoveTime=moveTime;
}