//** 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.
//** feb 2nd, 10" (v1.4): adds ability to specify delay before sub menus appear and disappear, respectively. see showhidedelay variable below

//** dec 17th, 10" (v1.5): updated menu shadow to use css3 box shadows when the browser is ff3.5+, ie9+, opera9.5+, or safari3+/chrome. only .js file changed.

var ddsmoothmenu={

//specify full url to down and right arrow images (23 is padding-right added to top level lis with drop downs):
arrowimages: {down:['downarrowclass', menuimg_path+'images/down.gif', 0], right:['rightarrowclass', menuimg_path+'images/right.gif']},
transition: {overtime:300, outtime:300}, //duration of slide in/ out animation, in milliseconds
shadow: {enable:false, offsetx:4, offsety:4}, //enable shadow?
showhidedelay: {showdelay: 100, hidedelay: 200}, //set delay in milliseconds before sub menus appear and disappear, respectively

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

detectwebkit: navigator.useragent.tolowercase().indexof("applewebkit")!=-1, //detect webkit browsers (safari, chrome etc)
detectie6: document.all && !window.xmlhttprequest,
css3support: window.msperformance || (!document.all && document.queryselector), //detect browsers that support css3 box shadows (ie9+ or ff3.5+, safari3+, chrome etc)

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){
			$menucontainer.html(content)
			ddsmoothmenu.buildmenu($, setting)
		}
	})
},


buildmenu:function($, setting){
	var smoothmenu=ddsmoothmenu
	var $mainmenu=$("#"+setting.mainmenuid+">ul") //reference main menu ul
	$mainmenu.parent().get(0).classname=setting.classname || "ddsmoothmenu"
	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'})
		$subul.data('timers', {})
		this._dimensions={w:this.offsetwidth, h:this.offsetheight, subulw:$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+5+"px" : 0})
		$curobj.children("a:eq(0)").css(this.istopheader? {paddingright: smoothmenu.arrowimages.down[2]} : {}).append( //add arrow images
		//$curobj.find("span: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 && !smoothmenu.css3support){ //if shadows enabled and browser doesn't support css3 box shadows
			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 $targetul=$subul //reference ul to reveal
				var header=$curobj.get(0) //reference header li as dom object
				cleartimeout($targetul.data('timers').hidetimer)
				$targetul.data('timers').showtimer=settimeout(function(){
					header._offsets={left:$curobj.offset().left, top:$curobj.offset().top}
					var menuleft=header.istopheader && setting.orientation!='v'? 0 : header._dimensions.w
					menuleft=(header._offsets.left+menuleft+header._dimensions.subulw>$(window).width())? (header.istopheader && setting.orientation!='v'? -header._dimensions.subulw+header._dimensions.w : -header._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:header._dimensions.subulw+'px'}).animate({height:'show',opacity:'show'}, ddsmoothmenu.transition.overtime)
						if (smoothmenu.shadow.enable && !smoothmenu.css3support){
							var shadowleft=header.istopheader? $targetul.offset().left+ddsmoothmenu.shadow.offsetx : menuleft
							var shadowtop=header.istopheader?$targetul.offset().top+smoothmenu.shadow.offsety : header._shadowoffset.y
							if (!header.istopheader && ddsmoothmenu.detectwebkit){ //in webkit browsers, restore shadow's opacity to full
								header.$shadow.css({opacity:1})
							}
							header.$shadow.css({overflow:'', width:header._dimensions.subulw+'px', left:shadowleft+'px', top:shadowtop+'px'}).animate({height:header._dimensions.subulh+'px'}, ddsmoothmenu.transition.overtime)
						}
					}
				}, ddsmoothmenu.showhidedelay.showdelay)
			},
			function(e){
				var $targetul=$subul
				var header=$curobj.get(0)
				cleartimeout($targetul.data('timers').showtimer)
				$targetul.data('timers').hidetimer=settimeout(function(){
					$targetul.animate({height:'hide', opacity:'hide'}, ddsmoothmenu.transition.outtime)
					if (smoothmenu.shadow.enable && !smoothmenu.css3support){
						if (ddsmoothmenu.detectwebkit){ //in webkit browsers, set first child shadow's opacity to 0, as "overflow:hidden" doesn't work in them
							header.$shadow.children('div:eq(0)').css({opacity:0})
						}
						header.$shadow.css({overflow:'hidden'}).animate({height:0}, ddsmoothmenu.transition.outtime)
					}
				}, ddsmoothmenu.showhidedelay.hidedelay)
			}
		) //end hover
	}) //end $headers.each()
	if (smoothmenu.shadow.enable && smoothmenu.css3support){ //if shadows enabled and browser supports css3 shadows
		var $toplevelul=$('#'+setting.mainmenuid+' ul li ul')
		var css3shadow=parseint(smoothmenu.shadow.offsetx)+"px "+parseint(smoothmenu.shadow.offsety)+"px 5px #aaa" //construct css3 box-shadow value
		var shadowprop=["boxshadow", "mozboxshadow", "webkitboxshadow", "msboxshadow"] //possible vendor specific css3 shadow properties
		for (var i=0; i<shadowprop.length; i++){
			$toplevelul.css(shadowprop[i], css3shadow)
		}
	}
	$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($){ //ajax menu?
		if (typeof setting.contentsource=="object"){ //if external ajax menu
			ddsmoothmenu.getajaxmenu($, setting)
		}
		else{ //else if markup menu
			ddsmoothmenu.buildmenu($, setting)
		}
	})
}

} //end ddsmoothmenu variable