var MENUDIV_ID="menu";
var SUBMENU_CLASS='subMenu';
var menuItems;
var slideSpeed_out=15;
var slideSpeed_in=15;
var delayMenuClose=180;
var slideTimeout_out=0;
var slideTimeout_in=0;
var xOffsetSubMenu=0;
var indeces=new Array();indeces[0]=0;
var isMSIE=navigator.userAgent.indexOf('MSIE')>=0?true:false;
var browserVersion=parseInt(navigator.userAgent.replace(/.*?MSIE ([0-9]+?)[^0-9].*/g,'$1'));if(!browserVersion)browserVersion=1;

function mouseOn(obj)
	{
	var mi=findNode(getSearchIdFromObj(obj));
	if(mi)mi.mouseOn();
	}

function mouseOff(obj)
	{
	var mi=findNode(getSearchIdFromObj(obj));
	if(mi)mi.mouseOff();
	}

function getSearchIdFromObj(obj)
	{
	var objId=obj.id;
	var idx=objId.indexOf('_');
	if(idx>=0)
		{
		return "MenuItem"+objId.substring(idx);
		}
	return null;
	}

function slideChildMenu(aId)
	{
	var mi=findNode(aId);
	if(mi)mi.slideChildMenu();
	}

function findNode(searchId)
	{
	var result;
	for(var no=0;no<menuItems.length;no++)
		{
		result=menuItems[no].findNode(searchId);
		if(result)return result;
		}
	return null;
	}

function getNextIndex(lvl)
	{
	var result=0;
	if(indeces.length<=lvl)
		{
		indeces[lvl]=1;
		}
		else
			{
			result=indeces[lvl];
			indeces[lvl]++;
			}
	return result;
	}

function MenuItem(divref,ulref,liref,lvlnum,parentref)
	{
	this.parent=parentref;
	this.div=divref;
	this.ul=ulref;
	this.width=this.ul.offsetWidth;
	this.li=liref;
	this.alink=this.li.getElementsByTagName('A')[0];
	this.lvl=lvlnum;
	this.idx=getNextIndex(this.lvl);
	this.children;
	this.subUL=this.li.getElementsByTagName('UL')[0];
	this.children;
	this.isMouseOnMe=false;
	this.isChildMenuOpen=false;
	this.isChildMenuClosed=true;
	if(this.alink)
		{
		if(this.alink.parentNode!=this.li)this.alink=null;
		}
	if(this.subUL)
		{
		this.children=new Array();
		var subLI=this.subUL.getElementsByTagName('LI')[0];
		while(subLI)
			{
			if(subLI.tagName&&subLI.tagName.toLowerCase()=='li')
				{
				this.children[this.children.length]=new MenuItem(null,this.subUL,subLI,this.lvl+1,this);
				}
			subLI=subLI.nextSibling;
			}
		}
	this.getPostfix=function()
		{
		return '_'+this.idx+'_'+this.lvl;
		}
	this.getId=function()
		{
		return "MenuItem"+this.getPostfix();
		}
	this.hasChildren=function()
		{
		return (this.children!=null);
		}
	this.getTopPos=function()
		{
		var origDisp=this.div.style.display;
		this.div.style.display="";
		var obj=this.li;
		var result=obj.offsetTop;
		while((obj=obj.offsetParent)!=null)result+=obj.offsetTop;
		this.div.style.display=origDisp;
		return result;
		}
	this.getLeftPos=function()
		{
		var origDisp=this.div.style.display;
		this.div.style.display="";
		var obj=this.li;
		var result=obj.offsetLeft;
		while((obj=obj.offsetParent)!=null)result+=obj.offsetLeft;
		this.div.style.display=origDisp;
		return result;
		}
	this.renderNode=function()
		{
		this.li.id="menuItemLI"+this.getPostfix();
		this.ul.style.position="relative";
		if(this.alink)
			{
			this.alink.id="menuItemA"+this.getPostfix();
			this.alink.onmouseover=function()
				{
				mouseOn(this);
				};
			this.alink.onmouseout=function()
				{
				mouseOff(this);
				};
			}
			else
				{
				this.li.onmouseover=function()
					{
					mouseOn(this);
					};
				this.li.onmouseout=function()
					{
					mouseOff(this);
					};
				}
		if(this.hasChildren())
			{
			var mi=this.children[0];
			var subdiv=document.createElement('DIV');
			subdiv.className=SUBMENU_CLASS;
			document.body.appendChild(subdiv);
			subdiv.id="menuItemDIV"+mi.getPostfix();
			this.subUL.id="menuItemUL"+mi.getPostfix();
			subdiv.appendChild(this.subUL);
			subdiv.style.left=this.getLeftPos()+this.width+xOffsetSubMenu+'px';
			subdiv.style.top=this.getTopPos()+'px';
			subdiv.style.visibility="hidden";
			subdiv.style.display="none";
			subdiv.style.zindex="1000";
			for(var no=0;no<this.children.length;no++)
				{
				var mi=this.children[no];
				mi.div=subdiv;
				mi.renderNode();
				}
			}
		return this.li;
		}
	this.findNode=function(searchId)
		{
		var result;
		if(this.getId()==searchId)
			{
			result=this;
			}
			else
				{
				if(this.hasChildren())
					{
					for(var no=0;no<this.children.length;no++)
						{
						var mi=this.children[no];
						result=mi.findNode(searchId);
						if(result!=null)break;
						}
					}
				}
		return result;
		}
	this.mouseOn=function()
		{
		this.isMouseOnMe=true;
		if(this.hasChildren()&&this.isChildMenuClosed)
			{
			this.initiateChildMenuOpen();
			}
		}
	this.mouseOff=function()
		{
		this.isMouseOnMe=false;
		if(this.hasChildren()&&!this.isChildMenuClosed)
			{
			this.initiateChildMenuClose();
			}
			else if(this.parent)
				{
				this.parent.mouseOff();
				}
		}
	this.isMouseOnChild=function()
		{
		if(this.isMouseOnMe)return true;
		if(this.hasChildren())
			{
			for(var no=0;no<this.children.length;no++)
				{
				if(this.children[no].isMouseOnChild())return true;
				}
			}
		return false;
		}
	this.initiateChildMenuOpen=function()
		{
		this.isChildMenuClosed=false;
		var childDiv=this.children[0].div;
		childDiv.style.width="0px";
		childDiv.style.visibility="visible";
		childDiv.style.display="";
		this.slideChildMenu();
		}
	this.initiateChildMenuClose=function()
		{
		this.isChildMenuOpen=false;
		setTimeout("slideChildMenu('"+this.getId()+"')",delayMenuClose);
		}
	this.slideChildMenu=function()
		{
		var divref=this.children[0].div;
		var ulref=this.children[0].ul;
		var maxwidth=this.children[0].width;
		var nextWidth;
		if(this.isMouseOnMe||this.isMouseOnChild())
			{
			nextWidth=divref.offsetWidth+slideSpeed_out;
			if(nextWidth>=maxwidth)
				{
				this.finishOpeningChild(divref,ulref,maxwidth);
				}
				else
					{
					ulref.style.left=nextWidth-maxwidth+"px";
					divref.style.width=nextWidth+"px";
					setTimeout("slideChildMenu('"+this.getId()+"')",slideTimeout_out);
					}
			}
			else
				{
				nextWidth=divref.offsetWidth-slideSpeed_in;
				if(nextWidth<=0)
					{
					this.finishClosingChild(divref,ulref,maxwidth);
					}
					else
						{
						ulref.style.left=nextWidth-maxwidth+"px";
						divref.style.width=nextWidth+"px";
						setTimeout("slideChildMenu('"+this.getId()+"')",slideTimeout_out);
						}
				}
		}
	this.finishOpeningChild=function(divref,ulref,maxwidth)
		{
		this.isChildMenuOpen=true;
		this.isChildMenuClosed=false;
		ulref.style.left="0px";
		divref.style.width=maxwidth+"px";
		}
	this.finishClosingChild=function(divref,ulref,maxwidth)
		{
		this.isChildMenuOpen=false;
		this.isChildMenuClosed=true;
		divref.style.visibility="hidden";
		divref.style.display="none";
		divref.style.width=maxwidth+"px";
		if(this.parent)this.parent.mouseOff();
		}
	}

function collectMenuNodes(menuObj)
	{
	if(!menuObj)return null;
	var results=new Array();
	var menuUL=menuObj.getElementsByTagName('UL')[0];
	var menuLI=menuUL.getElementsByTagName('LI')[0];
	while(menuLI)
		{
		if(menuLI.tagName&&menuLI.tagName.toLowerCase()=='li')
			{
			results[results.length]=new MenuItem(menuObj,menuUL,menuLI,0,null);
			}
		menuLI=menuLI.nextSibling;
		}
	return results;
	}

function initMenu()
	{
	var mainDiv=document.getElementById(MENUDIV_ID);
	menuItems=collectMenuNodes(mainDiv);
	if(menuItems)
		{
		for(var no=0;no<menuItems.length;no++)
			{
			var mi=menuItems[no];
			mi.renderNode();
			}
		mainDiv.style.visibility='visible';
		}
	}
window.onload=initMenu;