//Chrome Drop Down Menu v2.01- Author: Dynamic Drive (http://www.dynamicdrive.com)
//Last updated: November 14th 06- added iframe shim technique

var cssdropdown = {
	disappeardelay: 100, 		//set delay in miliseconds before menu disappears onmouseout
	disablemenuclick: false, 	//when user clicks on a menu item with a drop down menu, disable menu item's link?
	enableswipe: 1, 			//enable swipe effect? 1 for yes, 0 for no
	enableiframeshim: 1,		//enable "iframe shim" technique to get drop down menus to correctly appear on top of controls such as form objects in IE5.5/IE6? 1 for yes, 0 for no

	//No need to edit beyond here////////////////////////
	dropmenuobj: null, ie: document.all, firefox: document.getElementById&&!document.all, swipetimer: undefined, bottomclip:0,

	getposOffset:function(what, offsettype)
	{
		var totaloffset = (offsettype == "left") ? what.offsetLeft : what.offsetTop;
		var parentEl = what.offsetParent;
		while (parentEl != null)
		{
			totaloffset = (offsettype == "left") ? totaloffset + parentEl.offsetLeft : totaloffset + parentEl.offsetTop;
			parentEl = parentEl.offsetParent;
		}
	return totaloffset;
},

swipeeffect:function()
{
	if (this.bottomclip < parseInt(this.dropmenuobj.offsetHeight))
	{
		this.bottomclip += 10 + (this.bottomclip / 10) //unclip drop down menu visibility gradually
		this.dropmenuobj.style.clip = "rect(0 auto " + this.bottomclip + "px 0)"
	}
	else
	{
		return
	}
	this.swipetimer = setTimeout("cssdropdown.swipeeffect()", 10)
	
},

showhide:function(obj, e)
{
	if (this.ie || this.firefox)
	{
		this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"
	}
	if (e.type=="click" && obj.visibility==hidden || e.type=="mouseover")
	{
		if (this.enableswipe == 1)
		{
			if (typeof this.swipetimer != "undefined")
			{
				clearTimeout(this.swipetimer)
				obj.clip = "rect(0 auto 0 0)" //hide menu via clipping
		
				this.bottomclip = 0
				this.swipeeffect()
			}
		}
		
		obj.visibility = "visible"
	}
	else if (e.type == "click")
	{
		obj.visibility = "hidden"
	}
},

iecompattest:function()
{
	return (document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body
},

clearbrowseredge:function(obj, whichedge)
{
	var edgeoffset = 0
	if (whichedge == "rightedge")
	{
		var windowedge = this.ie && !window.opera ? this.iecompattest().scrollLeft + this.iecompattest().clientWidth - 15 : window.pageXOffset + window.innerWidth - 15
		this.dropmenuobj.contentmeasure = this.dropmenuobj.offsetWidth
		if (windowedge - this.dropmenuobj.x < this.dropmenuobj.contentmeasure)  //move menu to the left?
		{
			edgeoffset = this.dropmenuobj.contentmeasure - obj.offsetWidth
		}
	}
	return edgeoffset
},

dropit:function(obj, e, dropmenuID)
{
	if (this.dropmenuobj != null) //hide previous menu
	{
		this.dropmenuobj.style.visibility = "hidden" //hide menu
	}
	this.clearhidemenu()
	
	if (this.ie || this.firefox)
	{
		obj.onmouseout = function()
		{
			cssdropdown.delayhidemenu()
		}
		obj.onclick = function()
		{
			return !cssdropdown.disablemenuclick
		} //disable main menu item link onclick?
	
		this.dropmenuobj = document.getElementById(dropmenuID)
		this.dropmenuobj.onmouseover = function()
		{
			cssdropdown.clearhidemenu()
		}
		this.dropmenuobj.onmouseout = function(e)
		{
			cssdropdown.dynamichide(e)
		}
		this.dropmenuobj.onclick = function()
		{
			cssdropdown.delayhidemenu()
		
		}
		this.showhide(this.dropmenuobj.style, e)
		this.dropmenuobj.x = this.getposOffset(obj, "left")
		this.dropmenuobj.y = this.getposOffset(obj, "top")
		this.dropmenuobj.style.left = this.dropmenuobj.x - this.clearbrowseredge(obj, "rightedge") + "px"
		this.dropmenuobj.style.top = this.dropmenuobj.y - this.clearbrowseredge(obj, "bottomedge") + obj.offsetHeight + 1 + "px"
		this.positionshim() //call iframe shim function
	}
},

positionshim:function()
{ //display iframe shim function
	if (this.enableiframeshim && typeof this.shimobject != "undefined")
	{
		
		
		if (this.dropmenuobj.style.visibility == "visible")
		{
			this.shimobject.style.width = this.dropmenuobj.offsetWidth + "px"
			this.shimobject.style.height = this.dropmenuobj.offsetHeight + "px"
			this.shimobject.style.left = this.dropmenuobj.style.left
			this.shimobject.style.top = this.dropmenuobj.style.top
		}
		this.shimobject.style.display = (this.dropmenuobj.style.visibility == "visible") ? "block" : "none"
	}
},

hideshim:function()
{
	if (this.enableiframeshim && typeof this.shimobject != "undefined")
	{
		this.shimobject.style.display = 'none'
	}
},

contains_firefox:function(a, b)
{
	while (b.parentNode)
	{
		if ((b = b.parentNode) == a)
		{
			return true;
		}
		return false;
	}
},

dynamichide:function(e)
{
	var evtobj = window.event ? window.event : e
	if (this.ie&&!this.dropmenuobj.contains(evtobj.toElement))
	{
		this.delayhidemenu()
	}
	else if (this.firefox && e.currentTarget != evtobj.relatedTarget && !this.contains_firefox(evtobj.currentTarget, evtobj.relatedTarget))
	{
		this.delayhidemenu()
	}
},

delayhidemenu:function()
{
	this.delayhide = setTimeout("cssdropdown.dropmenuobj.style.visibility='hidden'; cssdropdown.hideshim()", this.disappeardelay) //hide menu
},

clearhidemenu:function()
{
	if (this.delayhide != "undefined")
	{
		clearTimeout(this.delayhide)
	}
},

startbuilding:function()
{
	for (var ids = 0; ids < arguments.length; ids++)
	{
		var menuitems = document.getElementById(arguments[ids]).getElementsByTagName("a")
		for (var i = 0; i < menuitems.length; i++)
		{
			if (menuitems[i].getAttribute("rel"))
			{
				var relvalue = menuitems[i].getAttribute("rel")
				menuitems[i].onmouseover = function(e)
				{
					var event = typeof e != "undefined" ? e : window.event
					cssdropdown.dropit(this,event,this.getAttribute("rel"))
				}
			}
		}
	}

	//if IE5.5 to IE6, create iframe for iframe shim technique
	if (window.createPopup && !window.XmlHttpRequest)
	{ 
		document.write('<IFRAME id="iframeshim"  src="" style="display: none; left: 0; top: 0; z-index: 90; position: absolute; filter: progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)" frameBorder="0" scrolling="no"></IFRAME>')
		this.shimobject = document.getElementById("iframeshim") //reference iframe object
	}
}

}