//** smooth navigational menu- by dynamic drive dhtml code library: http://www.dynamicdrive.com
//** script download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/ddlevelsmenu/
//** menu created: nov 12, 2008

//** dec 12th, 08" (v1.01): fixed shadow issue when multiple lis within the same ul (level) contain sub menus: http://www.dynamicdrive.com/forums/showthread.php?t=39177&highlight=smooth

//** feb 11th, 09" (v1.02): the currently active main menu item (li a) now gets a css class of ".selected", including sub menu items.

//** may 1st, 09" (v1.3):
//** 1) now supports vertical (side bar) menu mode- set "orientation" to 'v'
//** 2) in ie6, shadows are now always disabled

//** july 27th, 09" (v1.31): fixed bug so shadows can be disabled if desired.


var menu={

//specify full url to down and right arrow images (23 is padding-right added to top level lis with drop downs):
arrowimages: {down:['downarrowclass', 'down.gif', 23], right:['rightarrowclass', 'right.gif']},

transition: {overtime:300, outtime:300}, //duration of slide in/ out animation, in milliseconds
shadow: {enable:false, offsetx:0, offsety:0},

///////stop configuring beyond here///////////////////////////

detectwebkit: navigator.useragent.tolowercase().indexof("applewebkit")!=-1, //detect webkit browsers (safari, chrome etc)
detectie6: document.all && !window.xmlhttprequest,

getajaxmenu:function($, setting){ //function to fetch external page containing the panel divs
	var $menucontainer=$('#'+setting.contentsource[0]) //reference empty div on page that will hold menu
	$menucontainer.html("loading menu...")
	$.ajax({
		url: setting.contentsource[1], //path to external menu file
		async: true,
		error:function(ajaxrequest){
			$menucontainer.html('error fetching content. server response: '+ajaxrequest.responsetext)
		},
		success:function(content){
			$menucontainer.html(content)
			menu.buildmenu($, setting)
		}
	})
},


buildmenu:function($, setting){
	var smoothmenu=menu
	var $mainmenu=$("#"+setting.mainmenuid+">ul") //reference main menu ul
	$mainmenu.parent().get(0).classname=setting.classname || "menu"
	var $headers=$mainmenu.find("ul").parent()
	$headers.hover(
		function(e){
			$(this).children('a:eq(0)').addclass('selected')
		},
		function(e){
			$(this).children('a:eq(0)').removeclass('selected')
		}
	)
	$headers.each(function(i){ //loop through each li header
		var $curobj=$(this).css({zindex: 100-i}) //reference current li header
		var $subul=$(this).find('ul:eq(0)').css({display:'block'})
		this._dimensions={w:this.offsetwidth, h:this.offsetheight, subulw:$subul.outerwidth(), subulh:$subul.outerheight()}
		this.istopheader=$curobj.parents("ul").length==1? true : false //is top level header?
		$subul.css({top:this.istopheader && setting.orientation!='v'? this._dimensions.h+"px" : 0})
		/*
		$curobj.children("a:eq(0)").css(this.istopheader? {paddingright: smoothmenu.arrowimages.down[2]} : {}).append( //add arrow images
			'<img src="'+ (this.istopheader && setting.orientation!='v'? smoothmenu.arrowimages.down[1] : smoothmenu.arrowimages.right[1])
			+'" class="' + (this.istopheader && setting.orientation!='v'? smoothmenu.arrowimages.down[0] : smoothmenu.arrowimages.right[0])
			+ '" style="border:0;" />'
		)
		*/
		if (smoothmenu.shadow.enable){
			this._shadowoffset={x:(this.istopheader?$subul.offset().left+smoothmenu.shadow.offsetx : this._dimensions.w), y:(this.istopheader? $subul.offset().top+smoothmenu.shadow.offsety : $curobj.position().top)} //store this shadow's offsets
			if (this.istopheader)
				$parentshadow=$(document.body)
			else{
				var $parentli=$curobj.parents("li:eq(0)")
				$parentshadow=$parentli.get(0).$shadow
			}
			this.$shadow=$('<div class="ddshadow'+(this.istopheader? ' toplevelshadow' : '')+'"></div>').prependto($parentshadow).css({left:this._shadowoffset.x+'px', top:this._shadowoffset.y+'px'})  //insert shadow div and set it to parent node for the next shadow div
		}
		$curobj.hover(
			function(e){
				var $targetul=$(this).children("ul:eq(0)")
				this._offsets={left:$(this).offset().left, top:$(this).offset().top}
				var menuleft=this.istopheader && setting.orientation!='v'? 0 : this._dimensions.w
				menuleft=(this._offsets.left+menuleft+this._dimensions.subulw>$(window).width())? (this.istopheader && setting.orientation!='v'? -this._dimensions.subulw+this._dimensions.w : -this._dimensions.w) : menuleft //calculate this sub menu's offsets from its parent
				if ($targetul.queue().length<=1){ //if 1 or less queued animations
					$targetul.css({left:menuleft+"px", width:this._dimensions.subulw+'px'}).animate({height:'show',opacity:'show'}, menu.transition.overtime)
					if (smoothmenu.shadow.enable){
						var shadowleft=this.istopheader? $targetul.offset().left+menu.shadow.offsetx : menuleft
						var shadowtop=this.istopheader?$targetul.offset().top+smoothmenu.shadow.offsety : this._shadowoffset.y
						if (!this.istopheader && menu.detectwebkit){ //in webkit browsers, restore shadow's opacity to full
							this.$shadow.css({opacity:1})
						}
						this.$shadow.css({overflow:'', width:this._dimensions.subulw+'px', left:shadowleft+'px', top:shadowtop+'px'}).animate({height:this._dimensions.subulh+'px'}, menu.transition.overtime)
					}
				}
			},
			function(e){
				var $targetul=$(this).children("ul:eq(0)")
				$targetul.animate({height:'hide', opacity:'hide'}, menu.transition.outtime)
				if (smoothmenu.shadow.enable){
					if (menu.detectwebkit){ //in webkit browsers, set first child shadow's opacity to 0, as "overflow:hidden" doesn't work in them
						this.$shadow.children('div:eq(0)').css({opacity:0})
					}
					this.$shadow.css({overflow:'hidden'}).animate({height:0}, menu.transition.outtime)
				}
			}
		) //end hover
	}) //end $headers.each()
	$mainmenu.find("ul").css({display:'none', visibility:'visible'})
},

init:function(setting){
	if (typeof setting.customtheme=="object" && setting.customtheme.length==2){ //override default menu colors (default/hover) with custom set?
		var mainmenuid='#'+setting.mainmenuid
		var mainselector=(setting.orientation=="v")? mainmenuid : mainmenuid+', '+mainmenuid
		document.write('<style type="text/css">\n'
			+mainselector+' ul li a {background:'+setting.customtheme[0]+';}\n'
			+mainmenuid+' ul li a:hover {background:'+setting.customtheme[1]+';}\n'
		+'</style>')
	}
	this.shadow.enable=(document.all && !window.xmlhttprequest)? false : this.shadow.enable //in ie6, always disable shadow
	jquery(document).ready(function($){ //ajax menu?
		if (typeof setting.contentsource=="object"){ //if external ajax menu
			menu.getajaxmenu($, setting)
		}
		else{ //else if markup menu
			menu.buildmenu($, setting)
		}
	})
}

} //end menu variable

//initialize menu instance(s):