//** 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

//** Updated: Oct 29th, 08 to v2.5 (only .js file modified from v2.4)
	//1) Added ability to customize reveal animation speed (# of steps)
	//2) Menu now works in IE8 beta2 (a valid doctype at the top of the page is required)

(function($) {
	$.extend($.fx.step,{
	    backgroundPosition: function(fx) {
            if (fx.state === 0 && typeof fx.end == 'string') {
                var start = $.curCSS(fx.elem,'backgroundPosition');
                start = toArray(start);
                fx.start = [start[0],start[2]];
                var end = toArray(fx.end);
                fx.end = [end[0],end[2]];
                fx.unit = [end[1],end[3]];
			}
            var nowPosX = [];
            nowPosX[0] = ((fx.end[0] - fx.start[0]) * fx.pos) + fx.start[0] + fx.unit[0];
            nowPosX[1] = ((fx.end[1] - fx.start[1]) * fx.pos) + fx.start[1] + fx.unit[1];
            fx.elem.style.backgroundPosition = nowPosX[0]+' '+nowPosX[1];

           function toArray(strg){
               strg = strg.replace(/left|top/g,'0px');
               strg = strg.replace(/right|bottom/g,'100%');
               strg = strg.replace(/([0-9\.]+)(\s|\)|$)/g,"$1px$2");
               var res = strg.match(/(-?[0-9\.]+)(px|\%|em|pt)\s(-?[0-9\.]+)(px|\%|em|pt)/);
               return [parseFloat(res[1],10),res[2],parseFloat(res[3],10),res[4]];
           }
        }
	});
})(jQuery);	




var cssdropdown={
disappeardelay: 250, //set delay in miliseconds before menu disappears onmouseout
dropdownindicator: '<img src="down.gif" border="0" />', //specify full HTML to add to end of each menu item with a drop down menu
enablereveal: [true, 14], //enable swipe effect? [true/false, steps (Number of animation steps. Integer between 1-20. Smaller=faster)]
enableiframeshim: 1, //enable "iframe shim" in IE5.5 to IE7? (1=yes, 0=no)

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

dropmenuobj: null, asscmenuitem: null, domsupport: document.all || document.getElementById, standardbody: null, iframeshimadded: false, revealtimers: {},

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;
},

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
},

showmenu:function(dropmenu, e){
	if (this.enablereveal[0]){
		if (!dropmenu._trueheight || dropmenu._trueheight<10)
			dropmenu._trueheight=dropmenu.offsetHeight
		clearTimeout(this.revealtimers[dropmenu.id])
		dropmenu.style.height=dropmenu._curheight=0
		dropmenu.style.overflow="hidden"
		dropmenu.style.visibility="visible"
		this.revealtimers[dropmenu.id]=setInterval(function(){cssdropdown.revealmenu(dropmenu)}, 10)
	}
	else{
		dropmenu.style.visibility="visible"
	}
	this.css(this.asscmenuitem, "selected", "add")
},

revealmenu:function(dropmenu, dir){
	var curH=dropmenu._curheight, maxH=dropmenu._trueheight, steps=this.enablereveal[1]
	if (curH<maxH){
		var newH=Math.min(curH, maxH)
		dropmenu.style.height=newH+"px"
		dropmenu._curheight= newH + Math.round((maxH-newH)/steps) + 1
	}
	else{ //if done revealing menu
		dropmenu.style.height="auto"
		dropmenu.style.overflow="hidden"
		clearInterval(this.revealtimers[dropmenu.id])
	}
},

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
		var dropmenuW=this.dropmenuobj.offsetWidth
		if (windowedge-this.dropmenuobj.x < dropmenuW)  //move menu to the left?
			edgeoffset=dropmenuW-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
		var dropmenuH=this.dropmenuobj._trueheight
		if (windowedge-this.dropmenuobj.y < dropmenuH){ //move up?
			edgeoffset=dropmenuH+obj.offsetHeight
			if ((this.dropmenuobj.y-topedge)<dropmenuH) //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.showmenu(this.dropmenuobj, 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.iframeshimadded){
		if (this.dropmenuobj.style.visibility=="visible"){
			this.shimobject.style.width=this.dropmenuobj.offsetWidth+"px"
			this.shimobject.style.height=this.dropmenuobj._trueheight+"px"
			this.shimobject.style.left=parseInt(this.dropmenuobj.style.left)+"px"
			this.shimobject.style.top=parseInt(this.dropmenuobj.style.top)+"px"
			this.shimobject.style.display="block"
		}
	}
},

hideshim:function(){
	if (this.iframeshimadded)
		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.asscmenuitem.style.color="#6E9835"
	this.css(this.asscmenuitem, "selected", "remove")
	this.dropmenuobj.style.visibility='hidden'
	this.dropmenuobj.style.left=this.dropmenuobj.style.top="-1000px"
	this.hideshim()
	
	
},

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

addEvent:function(target, functionref, tasktype){ 

    //set event listener cross browsers
	if (typeof target.addEventListener != 'undefined'){
		target.addEventListener(tasktype, functionref, false);
	}
	else if (typeof target.attachEvent != 'undefined'){
		target.attachEvent('on'+tasktype, function(){return functionref.call(target, window.event)});
	} else       
	 {       
	   tasktype = "on" + tasktype;       
		  
	   if (typeof target[tasktype] == "function")       
	   {       
		 var oldListener = target[tasktype];       
		  
		 target[tasktype] = function()       
		 {       
		   oldListener();       
		  
		   return functionRef();       
		 };       
	   }       
	   else       
	   {       
		 target[tasktype] = functionRef;       
	   }       
	 }       


},

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
				}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 (this.enableiframeshim && document.all && !window.XDomainRequest && !this.iframeshimadded){ //enable iframe shim in IE5.5 thru IE7?
		document.write('<IFRAME id="iframeshim" src="about:blank" frameBorder="0" scrolling="no" style="left:0; top:0; position:absolute; display:none;z-index:90; background: transparent;"></IFRAME>')
		this.shimobject=document.getElementById("iframeshim") //reference iframe object
		this.shimobject.style.filter='progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)'
		this.iframeshimadded=true
	}
} //end startchrome

}