//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:   250,	// delay in milsec 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)) {
			// unclip drop down menu visibility gradually
			this.bottomclip += 10 + (this.bottomclip / 10);
			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
			// move menu to the left?
			if (windowedge - this.dropmenuobj.x < this.dropmenuobj.contentmeasure)
				edgeoffset = this.dropmenuobj.contentmeasure-obj.offsetWidth
		}
		else {
			var topedge = this.ie && !window.opera ? this.iecompattest().scrollTop : window.pageYOffset
			var windowedge = this.ie && !window.opera ? this.iecompattest().scrollTop+this.iecompattest().clientHeight-15 : window.pageYOffset+window.innerHeight-18
			this.dropmenuobj.contentmeasure = this.dropmenuobj.offsetHeight
			// move up?
			if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){
				edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight
				// up no good either?
				if ((this.dropmenuobj.y - topedge) < this.dropmenuobj.contentmeasure)
					edgeoffset = this.dropmenuobj.y + obj.offsetHeight - topedge
			}
		}
		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)
	},

	startchrome: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>')
			//reference iframe object
			this.shimobject = document.getElementById("iframeshim")
		}
	}
}