//** Chrome Drop Down Menu- Author: Dynamic Drive (http://www.dynamicdrive.com)







//** Updated: July 14th 06' to v2.0



	//1) Ability to "left", "center", or "right" align the menu items easily, just by modifying the CSS property "text-align".



	//2) Added an optional "swipe down" transitional effect for revealing the drop down menus.



	//3) Support for multiple Chrome menus on the same page.







//** Updated: Nov 14th 06' to v2.01- added iframe shim technique







//** Updated: July 23rd, 08 to v2.4



	//1) Main menu items now remain "selected" (CSS class "selected" applied) when user moves mouse into corresponding drop down menu. 



	//2) Adds ability to specify arbitrary HTML that gets added to the end of each menu item that carries a drop down menu (ie: a down arrow image).



	//3) All event handlers added to the menu are now unobstrusive, allowing you to define your own "onmouseover" or "onclick" events on the menu items.



	//4) Fixed elusive JS error in FF that sometimes occurs when mouse quickly moves between main menu items and drop down menus











var cssdropdown={



disappeardelay: 500, //set delay in miliseconds before menu disappears onmouseout



dropdownindicator: '', //specify full HTML to add to end of each menu item with a drop down menu



enableswipe: 1, //enable swipe effect? 1 for yes, 0 for no



enableiframeshim: 1, //enable "iframe shim" in IE5.5/IE6? (1=yes, 0=no)







//No need to edit beyond here////////////////////////







dropmenuobj: null, asscmenuitem: null, domsupport: document.all || document.getElementById, standardbody: null, iframeshimadded: false, swipetimer: undefined, bottomclip:0,







getposOffset:function(what, offsettype){



	var totaloffset=(offsettype=="left")? -15 : 0;



	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)



},







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



},







showhide:function(obj, e){



	this.dropmenuobj.style.left=this.dropmenuobj.style.top="-500px"



	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"



},







clearbrowseredge:function(obj, whichedge){



	var edgeoffset=0



	if (whichedge=="rightedge"){



		var windowedge=document.all && !window.opera? this.standardbody.scrollLeft+this.standardbody.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



	}



	else{



		var topedge=document.all && !window.opera? this.standardbody.scrollTop : window.pageYOffset



		var windowedge=document.all && !window.opera? this.standardbody.scrollTop+this.standardbody.clientHeight-15 : window.pageYOffset+window.innerHeight-18



		this.dropmenuobj.contentmeasure=this.dropmenuobj.offsetHeight



		if (windowedge-this.dropmenuobj.y < this.dropmenuobj.contentmeasure){ //move up?



			edgeoffset=this.dropmenuobj.contentmeasure+obj.offsetHeight



			if ((this.dropmenuobj.y-topedge)<this.dropmenuobj.contentmeasure) //up no good either?



				edgeoffset=this.dropmenuobj.y+obj.offsetHeight-topedge



		}



	}



	return edgeoffset



},







dropit:function(obj, e, dropmenuID){



	if (this.dropmenuobj!=null) //hide previous menu



		this.hidemenu() //hide menu



	this.clearhidemenu()



	this.dropmenuobj=document.getElementById(dropmenuID) //reference drop down menu



	this.asscmenuitem=obj //reference associated menu item



	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'



},







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



},







dynamichide:function(m, e){



	if (!this.isContained(m, e)){



		this.delayhidemenu()



	}



},







delayhidemenu:function(){



	this.delayhide=setTimeout("cssdropdown.hidemenu()", this.disappeardelay) //hide menu



},







hidemenu:function(){



	this.dropmenuobj.style.visibility='hidden'



	this.dropmenuobj.style.left=this.dropmenuobj.style.top=0



	this.hideshim()



},







clearhidemenu:function(){



	if (this.delayhide!="undefined")



		clearTimeout(this.delayhide)



},







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)});



},







startchrome:function(){



	if (!this.domsupport)



		return



	this.standardbody=(document.compatMode=="CSS1Compat")? document.documentElement : document.body



	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")



				var asscdropdownmenu=document.getElementById(relvalue)



				this.addEvent(asscdropdownmenu, function(){cssdropdown.clearhidemenu()}, "mouseover")



				this.addEvent(asscdropdownmenu, function(e){cssdropdown.dynamichide(this, e)}, "mouseout")



				this.addEvent(asscdropdownmenu, function(){cssdropdown.delayhidemenu()}, "click")



				try{



					menuitems[i].innerHTML=menuitems[i].innerHTML+" "+this.dropdownindicator



				}catch(e){}



				this.addEvent(menuitems[i], function(e){ //show drop down menu when main menu items are mouse over-ed



					if (!cssdropdown.isContained(this, e)){



						var evtobj=window.event || e



						cssdropdown.dropit(this, evtobj, this.getAttribute("rel"))



					}



				}, "mouseover")



				this.addEvent(menuitems[i], function(e){cssdropdown.dynamichide(this, e)}, "mouseout") //hide drop down menu when main menu items are mouse out



				this.addEvent(menuitems[i], function(){cssdropdown.delayhidemenu()}, "click") //hide drop down menu when main menu items are clicked on



			}



		} //end inner for



	} //end outer for



	if (window.createPopup && !window.XmlHttpRequest &&!this.iframeshimadded){ //if IE5.5 to IE6, create iframe for iframe shim technique



		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



		this.iframeshimadded=true



	}



} //end startchrome







}