//** All Levels Navigational Menu- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com
//** Script Download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/ddlevelsmenu/
//** Usage Terms: http://www.dynamicdrive.com/notice.htm

//** Current version: 2.2 See changelog.txt for details
//global variable to detect if DOM is ready
if (typeof dd_domreadycheck=="undefined") var dd_domreadycheck=false;

var ddlevelsmenu={
		enableshim: true, //enable IFRAME shim to prevent drop down menus from being hidden below SELECT or FLASH elements? (tip: disable if not in use, for efficiency)
		arrowpointers:{
			downarrow: ["/images/arrow-down.gif", 11,7], //[path_to_down_arrow, arrowwidth, arrowheight]
			rightarrow: ["/images/arrow-right.gif", 12,12], //[path_to_right_arrow, arrowwidth, arrowheight]
			showarrow: {toplevel: false, sublevel: false} //Show arrow images on top level items and sub level items, respectively?
	},
	hideinterval: 200, //delay in milliseconds before entire menu disappears onmouseout.
	effects: {enableswipe: true, enablefade: true, duration: 200},
	httpsiframesrc: "blank.htm", //If menu is run on a secure (https) page, the IFRAME shim feature used by the script should point to an *blank* page *within* the secure area to prevent an IE security prompt. Specify full URL to that page on your server (leave as is if not applicable).
///No need to edit beyond here////////////////////
	topmenuids: [], //array containing ids of all the primary menus on the page
	topitems: {}, //object array containing all top menu item links
	subuls: {}, //object array containing all ULs
	lastactivesubul: {}, //object object containing info for last mouse out menu item's UL
	topitemsindex: -1,
	ulindex: -1,
	hidetimers: {}, //object array timer
	shimadded: false,
	nonFF: !/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent), //detect non FF browsers
	getoffset:function(what, offsettype){
		return (what.offsetParent) ? what[offsettype]+this.getoffset(what.offsetParent, offsettype) : what[offsettype];
	},
	getoffsetof:function(el){
		el._offsets={left:this.getoffset(el, "offsetLeft"), top:this.getoffset(el, "offsetTop")};
	},
	getwindowsize:function(){
		this.docwidth=window.innerWidth ? window.innerWidth-10 : this.standardbody.clientWidth-10;
		this.docheight=window.innerHeight ? window.innerHeight-15 : this.standardbody.clientHeight-18;
	},
	gettopitemsdimensions:function(){
		for (var m=0; m<this.topmenuids.length; m++){
			var topmenuid=this.topmenuids[m];
			for (var i=0; i<this.topitems[topmenuid].length; i++){
				var header=this.topitems[topmenuid][i];
				var submenu=document.getElementById(header.getAttribute('rel'));
				header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight};
			}
		}
	},
	isContained:function(m, e){
		var e=window.event || e;
		var c=e.relatedTarget || ((e.type=="mouseover")? e.fromElement : e.toElement);
		while (c && c!=m)try {c=c.parentNode} catch(e){c=m};
		if (c==m)
			return true
		else
			return false
	},
	addpointer:function(target, imgclass, imginfo, BeforeorAfter){
		var pointer=document.createElement("img");
		pointer.src=imginfo[0];
		pointer.style.width=imginfo[1]+"px";
		pointer.style.height=imginfo[2]+"px";
		if(imgclass=="rightarrowpointer"){
			pointer.style.left=target.offsetWidth-imginfo[2]-2+"px";
		}
		pointer.className=imgclass;
		var target_firstEl=target.childNodes[target.firstChild.nodeType!=1? 1 : 0]; //see if the first child element within A is a SPAN (found in sliding doors technique)
		if (target_firstEl && target_firstEl.tagName=="SPAN"){
			target=target_firstEl; //arrow should be added inside this SPAN instead if found
		}
		if (BeforeorAfter=="before") target.insertBefore(pointer, target.firstChild);
		else target.appendChild(pointer);
	},
	css:function(el, targetclass, action){
		var needle=new RegExp("(^|\\s+)"+targetclass+"($|\\s+)", "ig");
		if (action=="check") return needle.test(el.className);
		else if (action=="remove") el.className=el.className.replace(needle, "");
		else if (action=="add" && !needle.test(el.className)) el.className+=" "+targetclass;
	},
	addshimmy:function(target){
		var shim=(!window.opera)? document.createElement("iframe") : document.createElement("div"); //Opera 9.24 doesnt seem to support transparent IFRAMEs
		shim.className="ddiframeshim";
		shim.setAttribute("src", location.protocol=="https:"? this.httpsiframesrc : "about:blank");
		shim.setAttribute("frameborder", "0");
		target.appendChild(shim);
		try{ shim.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)';}
		catch(e){};
		return shim;
	},
	positionshim:function(header, submenu, dir, scrollX, scrollY){
		if (header._istoplevel){
			var scrollY=window.pageYOffset? window.pageYOffset : this.standardbody.scrollTop;
			var topgap=header._offsets.top-scrollY;
			var bottomgap=scrollY+this.docheight-header._offsets.top-header._dimensions.h;
			if (topgap>0){
				this.shimmy.topshim.style.left=scrollX+"px";
				this.shimmy.topshim.style.top=scrollY+"px";
				this.shimmy.topshim.style.width="99%";
				this.shimmy.topshim.style.height=topgap+"px"; //distance from top window edge to top of menu item
			}
			if (bottomgap>0){
				this.shimmy.bottomshim.style.left=scrollX+"px";
				this.shimmy.bottomshim.style.top=header._offsets.top + header._dimensions.h +"px";
				this.shimmy.bottomshim.style.width="99%";
				this.shimmy.bottomshim.style.height=bottomgap+"px"; //distance from bottom of menu item to bottom window edge
			}
		}
	},
	hideshim:function(){
		this.shimmy.topshim.style.width=this.shimmy.bottomshim.style.width=0;
		this.shimmy.topshim.style.height=this.shimmy.bottomshim.style.height=0;
	},
	buildmenu:function(mainmenuid, header, submenu, submenupos, istoplevel, dir){
		header._master=mainmenuid; //Indicate which top menu this header is associated with
		header._pos=submenupos; //Indicate pos of sub menu this header is associated with
		header._istoplevel=istoplevel;
		if (istoplevel){
			this.addEvent(header, function(e){ddlevelsmenu.hidemenu(ddlevelsmenu.subuls[this._master][parseInt(this._pos)]);}, "click");
		}
		this.subuls[mainmenuid][submenupos]=submenu;
		header._dimensions={w:header.offsetWidth, h:header.offsetHeight, submenuw:submenu.offsetWidth, submenuh:submenu.offsetHeight};
		this.getoffsetof(header);
		submenu.style.left=0;
		submenu.style.top=0;
		submenu.style.visibility="hidden";
		this.addEvent(header, function(e){ //mouseover event
			if (!ddlevelsmenu.isContained(this, e)){
				var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)];
				if (this._istoplevel){
					ddlevelsmenu.css(this, "selected", "add");
					clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos]);
				}
				ddlevelsmenu.getoffsetof(header);
				var scrollX=window.pageXOffset ? window.pageXOffset : ddlevelsmenu.standardbody.scrollLeft;
				var scrollY=window.pageYOffset ? window.pageYOffset : ddlevelsmenu.standardbody.scrollTop;
				var submenurightedge=this._offsets.left + this._dimensions.submenuw + (this._istoplevel && dir=="topbar"? 0 : this._dimensions.w);
				var submenubottomedge=this._offsets.top + this._dimensions.submenuh;
				//Sub menu starting left position
				var menuleft=(this._istoplevel? this._offsets.left + (dir=="sidebar"? this._dimensions.w : 0) : this._dimensions.w);
				if (submenurightedge-scrollX>ddlevelsmenu.docwidth){
					menuleft+= -this._dimensions.submenuw + (this._istoplevel && dir=="topbar" ? this._dimensions.w : -this._dimensions.w);
				}
				submenu.style.left=menuleft+"px";
				//Sub menu starting top position
				var menutop=(this._istoplevel? this._offsets.top + (dir=="sidebar"? 0 : this._dimensions.h) : this.offsetTop);
				if (submenubottomedge-scrollY>ddlevelsmenu.docheight){ //no room downwards?
					if (this._dimensions.submenuh<this._offsets.top+(dir=="sidebar"? this._dimensions.h : 0)-scrollY){ //move up?
						menutop+= - this._dimensions.submenuh + (this._istoplevel && dir=="topbar"? -this._dimensions.h : this._dimensions.h);
					}
					else{ //top of window edge
						menutop+= -(this._offsets.top-scrollY) + (this._istoplevel && dir=="topbar"? -this._dimensions.h : 0);
					}
				}
				submenu.style.top=menutop+"px";
				if (ddlevelsmenu.enableshim && (ddlevelsmenu.effects.enableswipe==false || ddlevelsmenu.nonFF)){ //apply shim immediately only if animation is turned off, or if on, in non FF2.x browsers
					ddlevelsmenu.positionshim(header, submenu, dir, scrollX, scrollY);
				}
				else{
					submenu.FFscrollInfo={x:scrollX, y:scrollY};
				}
				ddlevelsmenu.showmenu(header, submenu, dir);
			}
		}, "mouseover");
		this.addEvent(header, function(e){ //mouseout event
			var submenu=ddlevelsmenu.subuls[this._master][parseInt(this._pos)];
			if (this._istoplevel){
				if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(submenu, e)) //hide drop down ul if mouse moves out of menu bar item but not into drop down ul itself
					ddlevelsmenu.hidemenu(submenu);
			}
			else if (!this._istoplevel && !ddlevelsmenu.isContained(this, e)){
				ddlevelsmenu.hidemenu(submenu);
			}
	
		}, "mouseout");
	},	
	setopacity:function(el, value){
		el.style.opacity=value;
		if (typeof el.style.opacity!="string"){ //if it's not a string (ie: number instead), it means property not supported
			el.style.MozOpacity=value;
			if (el.filters) el.style.filter="progid:DXImageTransform.Microsoft.alpha(opacity="+ value*100 +")";
		}
	},
	showmenu:function(header, submenu, dir){
		if (this.effects.enableswipe || this.effects.enablefade){
			if (this.effects.enableswipe){
				var endpoint=(header._istoplevel && dir=="topbar")? header._dimensions.submenuh : header._dimensions.submenuw
				submenu.style.width=submenu.style.height=0
				submenu.style.overflow="hidden"
			}
			if (this.effects.enablefade){
				this.setopacity(submenu, 0) //set opacity to 0 so menu appears hidden initially
			}
			submenu._curanimatedegree=0
			submenu.style.visibility="visible"
			clearInterval(submenu._animatetimer)
			submenu._starttime=new Date().getTime() //get time just before animation is run
			submenu._animatetimer=setInterval(function(){ddlevelsmenu.revealmenu(header, submenu, endpoint, dir)}, 10)
		}
		else{
			submenu.style.visibility="visible"
		}
	},
	revealmenu:function(header, submenu, endpoint, dir){
		var elapsed=new Date().getTime()-submenu._starttime //get time animation has run
		if (elapsed<this.effects.duration){
			if (this.effects.enableswipe){
				if (submenu._curanimatedegree==0){ //reset either width or height of sub menu to "auto" when animation begins
					submenu.style[header._istoplevel && dir=="topbar"? "width" : "height"]="auto"
				}
				submenu.style[header._istoplevel && dir=="topbar"? "height" : "width"]=(submenu._curanimatedegree*endpoint)+"px"
			}
			if (this.effects.enablefade){
				this.setopacity(submenu, submenu._curanimatedegree)
			}
		}
		else{
			clearInterval(submenu._animatetimer)
			if (this.effects.enableswipe){
				submenu.style.width="auto"
				submenu.style.height="auto"
				submenu.style.overflow="visible"
			}
			if (this.effects.enablefade){
				this.setopacity(submenu, 1)
				submenu.style.filter=""
			}
			if (this.enableshim && submenu.FFscrollInfo) //if this is FF browser (meaning shim hasn't been applied yet
				this.positionshim(header, submenu, dir, submenu.FFscrollInfo.x, submenu.FFscrollInfo.y)
		}
		submenu._curanimatedegree=(1-Math.cos((elapsed/this.effects.duration)*Math.PI)) / 2
	},
	hidemenu:function(submenu){
		if (typeof submenu._pos!="undefined"){ //if submenu is outermost UL drop down menu
			this.css(this.topitems[submenu._master][parseInt(submenu._pos)], "selected", "remove")
			if (this.enableshim)
				this.hideshim()
		}
		clearInterval(submenu._animatetimer)
		submenu.style.left=0
		submenu.style.top="-1000px"
		submenu.style.visibility="hidden"
	},
	addEvent:function(target, functionref, tasktype) {
		if (target.addEventListener)
			target.addEventListener(tasktype, functionref, false);
		else if (target.attachEvent)
			target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
	},
	domready:function(functionref){ //based on code from the jQuery library
		if (dd_domreadycheck){
			functionref()
			return
		}
		// Mozilla, Opera and webkit nightlies currently support this event
		if (document.addEventListener) {
			// Use the handy event callback
			document.addEventListener("DOMContentLoaded", function(){
				document.removeEventListener("DOMContentLoaded", arguments.callee, false )
				functionref();
				dd_domreadycheck=true
			}, false )
		}
		else if (document.attachEvent){
			// If IE and not an iframe
			// continually check to see if the document is ready
			if ( document.documentElement.doScroll && window == window.top) (function(){
				if (dd_domreadycheck){
					functionref()
					return
				}
				try{
					// If IE is used, use the trick by Diego Perini
					// http://javascript.nwbox.com/IEContentLoaded/
					document.documentElement.doScroll("left")
				}catch(error){
					setTimeout( arguments.callee, 0)
					return;
				}
				//and execute any waiting functions
				functionref();
				dd_domreadycheck=true
			})();
		}
		if (document.attachEvent && parent.length>0) //account for page being in IFRAME, in which above doesn't fire in IE
			this.addEvent(window, function(){functionref()}, "load");
	},
	init:function(mainmenuid, dir){
		this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body
		this.topitemsindex=-1
		this.ulindex=-1
		this.topmenuids.push(mainmenuid)
		this.topitems[mainmenuid]=[] //declare array on object
		this.subuls[mainmenuid]=[] //declare array on object
		this.hidetimers[mainmenuid]=[] //declare hide entire menu timer
		if (this.enableshim && !this.shimadded){
			this.shimmy={}
			this.shimmy.topshim=this.addshimmy(document.body) //create top iframe shim obj
			this.shimmy.bottomshim=this.addshimmy(document.body) //create bottom iframe shim obj
			this.shimadded=true
		}
		var menubar=document.getElementById(mainmenuid)
		var alllinks=menubar.getElementsByTagName("a")
		this.getwindowsize()
		for (var i=0; i<alllinks.length; i++){
			if (alllinks[i].getAttribute('rel')){
				this.topitemsindex++
				this.ulindex++
				var menuitem=alllinks[i]
				this.topitems[mainmenuid][this.topitemsindex]=menuitem //store ref to main menu links
				var dropul=document.getElementById(menuitem.getAttribute('rel'))
				document.body.appendChild(dropul) //move main ULs to end of document
				dropul.style.zIndex=2000 //give drop down menus a high z-index
				dropul._master=mainmenuid  //Indicate which main menu this main UL is associated with
				dropul._pos=this.topitemsindex //Indicate which main menu item this main UL is associated with
				this.addEvent(dropul, function(){ddlevelsmenu.hidemenu(this)}, "click")
				var arrowclass=(dir=="sidebar")? "rightarrowpointer" : "downarrowpointer"
				var arrowpointer=(dir=="sidebar")? this.arrowpointers.rightarrow : this.arrowpointers.downarrow
				if (this.arrowpointers.showarrow.toplevel)
					this.addpointer(menuitem, arrowclass, arrowpointer, (dir=="sidebar")? "before" : "after")
				this.buildmenu(mainmenuid, menuitem, dropul, this.ulindex, true, dir) //build top level menu
				dropul.onmouseover=function(){
					clearTimeout(ddlevelsmenu.hidetimers[this._master][this._pos])
				}
				this.addEvent(dropul, function(e){ //hide menu if mouse moves out of main UL element into open space
					if (!ddlevelsmenu.isContained(this, e) && !ddlevelsmenu.isContained(ddlevelsmenu.topitems[this._master][parseInt(this._pos)], e)){
						var dropul=this
						if (ddlevelsmenu.enableshim)
							ddlevelsmenu.hideshim()
						ddlevelsmenu.hidetimers[this._master][this._pos]=setTimeout(function(){
							ddlevelsmenu.hidemenu(dropul)
						}, ddlevelsmenu.hideinterval)
					}
				}, "mouseout")
				var subuls=dropul.getElementsByTagName("ul")
				for (var c=0; c<subuls.length; c++){
					this.ulindex++
					var parentli=subuls[c].parentNode
					if (this.arrowpointers.showarrow.sublevel)
						this.addpointer(parentli.getElementsByTagName("a")[0], "rightarrowpointer", this.arrowpointers.rightarrow, "before")
					this.buildmenu(mainmenuid, parentli, subuls[c], this.ulindex, false, dir) //build sub level menus
				}
			}
		} //end for loop
		this.addEvent(window, function(){ddlevelsmenu.getwindowsize(); ddlevelsmenu.gettopitemsdimensions()}, "resize")
	},
	setup:function(mainmenuid, dir){
		this.domready(function(){ddlevelsmenu.init(mainmenuid, dir)})
	}
}