//** Accordion Content script: By Dynamic Drive, at http://www.dynamicdrive.com

//** http://www.dynamicdrive.com/dynamicindex17/ddaccordionmenu-urban.htm

//** Created: Jan 7th, 08'. Last updated: June 7th, 2010 to v1.9



//Version 1.9: June 7th, 2010':

//**1) Ajax content support added, so a given header's content can be dynamically fetched from an external file and on demand.

//**2) Optimized script performance by caching header and content container references





var ddaccordion={

	ajaxloadingmsg: '<img src="loading2.gif" /><br />Loading Content...', //customize HTML to output while Ajax content is being fetched (if applicable)



	headergroup: {}, //object to store corresponding header group based on headerclass value

	contentgroup: {}, //object to store corresponding content group based on headerclass value



	preloadimages:function($images){

		$images.each(function(){

			var preloadimage=new Image()

			preloadimage.src=this.src

		})

	},



	expandone:function(headerclass, selected){ //PUBLIC function to expand a particular header

		this.toggleone(headerclass, selected, "expand")

	},



	collapseone:function(headerclass, selected){ //PUBLIC function to collapse a particular header

		this.toggleone(headerclass, selected, "collapse")

	},



	expandall:function(headerclass){ //PUBLIC function to expand all headers based on their shared CSS classname

		var $headers=this.headergroup[headerclass]

		this.contentgroup[headerclass].filter(':hidden').each(function(){

			$headers.eq(parseInt($(this).attr('contentindex'))).trigger("evt_accordion")

		})

	},



	collapseall:function(headerclass){ //PUBLIC function to collapse all headers based on their shared CSS classname

		var $headers=this.headergroup[headerclass]

		this.contentgroup[headerclass].filter(':visible').each(function(){

			$headers.eq(parseInt($(this).attr('contentindex'))).trigger("evt_accordion")

		})

	},



	toggleone:function(headerclass, selected, optstate){ //PUBLIC function to expand/ collapse a particular header

		var $targetHeader=this.headergroup[headerclass].eq(selected)

		var $subcontent=this.contentgroup[headerclass].eq(selected)

		if (typeof optstate=="undefined" || optstate=="expand" && $subcontent.is(":hidden") || optstate=="collapse" && $subcontent.is(":visible"))

			$targetHeader.trigger("evt_accordion")

	},



	ajaxloadcontent:function($targetHeader, $targetContent, config, callback){

		var ajaxinfo=$targetHeader.data('ajaxinfo')



		function handlecontent(content){ //nested function

			if (content){ //if ajax content has loaded

				ajaxinfo.cacheddata=content //remember ajax content 

				ajaxinfo.status="cached" //set ajax status to cached

				if ($targetContent.queue("fx").length==0){ //if this content isn't currently expanding or collapsing

					$targetContent.hide().html(content) //hide loading message, then set sub content's HTML to ajax content

					ajaxinfo.status="complete" //set ajax status to complete

					callback() //execute callback function- expand this sub content

				}

			}

			if (ajaxinfo.status!="complete"){

				setTimeout(function(){handlecontent(ajaxinfo.cacheddata)}, 100) //call handlecontent() again until ajax content has loaded (ajaxinfo.cacheddata contains data)

			}

		} //end nested function



		if (ajaxinfo.status=="none"){ //ajax data hasn't been fetched yet

			$targetContent.html(this.ajaxloadingmsg)

			$targetContent.slideDown(config.animatespeed)

			ajaxinfo.status="loading" //set ajax status to "loading"

			$.ajax({

				url: ajaxinfo.url, //path to external menu file

				error:function(ajaxrequest){

					handlecontent('Error fetching content. Server Response: '+ajaxrequest.responseText)

				},

				success:function(content){

					content=(content=="")? " " : content //if returned content is empty, set it to "space" is content no longer returns false/empty (hasn't loaded yet)

					handlecontent(content)

				}

			})

		}

		else if (ajaxinfo.status=="loading")

			handlecontent(ajaxinfo.cacheddata)

	},



	expandit:function($targetHeader, $targetContent, config, useractivated, directclick, skipanimation){

		var ajaxinfo=$targetHeader.data('ajaxinfo')

		if (ajaxinfo){ //if this content should be fetched via Ajax

			if (ajaxinfo.status=="none" || ajaxinfo.status=="loading")

				this.ajaxloadcontent($targetHeader, $targetContent, config, function(){ddaccordion.expandit($targetHeader, $targetContent, config, useractivated, directclick)})

			else if (ajaxinfo.status=="cached"){

				$targetContent.html(ajaxinfo.cacheddata)

				ajaxinfo.cacheddata=null

				ajaxinfo.status="complete"

			}

		}

		this.transformHeader($targetHeader, config, "expand")

		$targetContent.slideDown(skipanimation? 0 : config.animatespeed, function(){

			config.onopenclose($targetHeader.get(0), parseInt($targetHeader.attr('headerindex')), $targetContent.css('display'), useractivated)

			if (config.postreveal=="gotourl" && directclick){ //if revealtype is "Go to Header URL upon click", and this is a direct click on the header

				var targetLink=($targetHeader.is("a"))? $targetHeader.get(0) : $targetHeader.find('a:eq(0)').get(0)

				if (targetLink) //if this header is a link

					setTimeout(function(){location=targetLink.href}, 200) //ignore link target, as window.open(targetLink, targetLink.target) doesn't work in FF if popup blocker enabled

			}

		})

	},



	collapseit:function($targetHeader, $targetContent, config, isuseractivated){

		this.transformHeader($targetHeader, config, "collapse")

		$targetContent.slideUp(config.animatespeed, function(){config.onopenclose($targetHeader.get(0), parseInt($targetHeader.attr('headerindex')), $targetContent.css('display'), isuseractivated)})

	},



	transformHeader:function($targetHeader, config, state){

		$targetHeader.addClass((state=="expand")? config.cssclass.expand : config.cssclass.collapse) //alternate btw "expand" and "collapse" CSS classes

		.removeClass((state=="expand")? config.cssclass.collapse : config.cssclass.expand)

		if (config.htmlsetting.location=='src'){ //Change header image (assuming header is an image)?

			$targetHeader=($targetHeader.is("img"))? $targetHeader : $targetHeader.find('img').eq(0) //Set target to either header itself, or first image within header

			$targetHeader.attr('src', (state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse) //change header image

		}

		else if (config.htmlsetting.location=="prefix") //if change "prefix" HTML, locate dynamically added ".accordprefix" span tag and change it

			$targetHeader.find('.accordprefix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)

		else if (config.htmlsetting.location=="suffix")

			$targetHeader.find('.accordsuffix').html((state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)

	},



	urlparamselect:function(headerclass){

		var result=window.location.search.match(new RegExp(headerclass+"=((\\d+)(,(\\d+))*)", "i")) //check for "?headerclass=2,3,4" in URL

		if (result!=null)

			result=RegExp.$1.split(',')

		return result //returns null, [index], or [index1,index2,etc], where index are the desired selected header indices

	},



	getCookie:function(Name){ 

		var re=new RegExp(Name+"=[^;]+", "i") //construct RE to search for target name/value pair

		if (document.cookie.match(re)) //if cookie found

			return document.cookie.match(re)[0].split("=")[1] //return its value

		return null

	},



	setCookie:function(name, value){

		document.cookie = name + "=" + value + "; path=/"

	},



	init:function(config){

	document.write('<style type="text/css">\n')

	document.write('.'+config.contentclass+'{display: none}\n') //generate CSS to hide contents

	document.write('a.hiddenajaxlink{display: none}\n') //CSS class to hide ajax link

	document.write('<\/style>')

	jQuery(document).ready(function($){

		ddaccordion.urlparamselect(config.headerclass)

		var persistedheaders=ddaccordion.getCookie(config.headerclass)

		ddaccordion.headergroup[config.headerclass]=$('.'+config.headerclass) //remember header group for this accordion

		ddaccordion.contentgroup[config.headerclass]=$('.'+config.contentclass) //remember content group for this accordion

		var $headers=ddaccordion.headergroup[config.headerclass]

		var $subcontents=ddaccordion.contentgroup[config.headerclass]

		config.cssclass={collapse: config.toggleclass[0], expand: config.toggleclass[1]} //store expand and contract CSS classes as object properties

		config.revealtype=config.revealtype || "click"

		config.revealtype=config.revealtype.replace(/mouseover/i, "mouseenter")

		if (config.revealtype=="clickgo"){

			config.postreveal="gotourl" //remember added action

			config.revealtype="click" //overwrite revealtype to "click" keyword

		}

		if (typeof config.togglehtml=="undefined")

			config.htmlsetting={location: "none"}

		else

			config.htmlsetting={location: config.togglehtml[0], collapse: config.togglehtml[1], expand: config.togglehtml[2]} //store HTML settings as object properties

		config.oninit=(typeof config.oninit=="undefined")? function(){} : config.oninit //attach custom "oninit" event handler

		config.onopenclose=(typeof config.onopenclose=="undefined")? function(){} : config.onopenclose //attach custom "onopenclose" event handler

		var lastexpanded={} //object to hold reference to last expanded header and content (jquery objects)

		var expandedindices=ddaccordion.urlparamselect(config.headerclass) || ((config.persiststate && persistedheaders!=null)? persistedheaders : config.defaultexpanded)

		if (typeof expandedindices=='string') //test for string value (exception is config.defaultexpanded, which is an array)

			expandedindices=expandedindices.replace(/c/ig, '').split(',') //transform string value to an array (ie: "c1,c2,c3" becomes [1,2,3]

		if (expandedindices.length==1 && expandedindices[0]=="-1") //check for expandedindices value of [-1], indicating persistence is on and no content expanded

			expandedindices=[]

		if (config["collapseprev"] && expandedindices.length>1) //only allow one content open?

			expandedindices=[expandedindices.pop()] //return last array element as an array (for sake of jQuery.inArray())

		if (config["onemustopen"] && expandedindices.length==0) //if at least one content should be open at all times and none are, open 1st header

			expandedindices=[0]

		$headers.each(function(index){ //loop through all headers

			var $header=$(this)

			if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && $header.html()!=""){ //add a SPAN element to header depending on user setting and if header is a container tag

				$('<span class="accordprefix"></span>').prependTo(this)

				$('<span class="accordsuffix"></span>').appendTo(this)

			}

			$header.attr('headerindex', index+'h') //store position of this header relative to its peers

			$subcontents.eq(index).attr('contentindex', index+'c') //store position of this content relative to its peers

			var $subcontent=$subcontents.eq(index)

			var $hiddenajaxlink=$subcontent.find('a.hiddenajaxlink:eq(0)') //see if this content should be loaded via ajax

			if ($hiddenajaxlink.length==1){

				$header.data('ajaxinfo', {url:$hiddenajaxlink.attr('href'), cacheddata:null, status:'none'}) //store info about this ajax content inside header

			}

			var needle=(typeof expandedindices[0]=="number")? index : index+'' //check for data type within expandedindices array- index should match that type

			if (jQuery.inArray(needle, expandedindices)!=-1){ //check for headers that should be expanded automatically (convert index to string first)

				ddaccordion.expandit($header, $subcontent, config, false, false, !config.animatedefault) //3rd last param sets 'isuseractivated' parameter, 2nd last sets isdirectclick, last sets skipanimation param

				lastexpanded={$header:$header, $content:$subcontent}

			}  //end check

			else{

				$subcontent.hide()

				config.onopenclose($header.get(0), parseInt($header.attr('headerindex')), $subcontent.css('display'), false) //Last Boolean value sets 'isuseractivated' parameter

				ddaccordion.transformHeader($header, config, "collapse")

			}

		})

		$headers.bind("evt_accordion", function(e, isdirectclick){ //assign CUSTOM event handler that expands/ contacts a header

				var $subcontent=$subcontents.eq(parseInt($(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed

				if ($subcontent.css('display')=="none"){

					ddaccordion.expandit($(this), $subcontent, config, true, isdirectclick) //2nd last param sets 'isuseractivated' parameter

					if (config["collapseprev"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?

						ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config, true) //Last Boolean value sets 'isuseractivated' parameter

					}

					lastexpanded={$header:$(this), $content:$subcontent}

				}

				else if (!config["onemustopen"] || config["onemustopen"] && lastexpanded.$header && $(this).get(0)!=lastexpanded.$header.get(0)){

					ddaccordion.collapseit($(this), $subcontent, config, true) //Last Boolean value sets 'isuseractivated' parameter

				}

 		})

		$headers.bind(config.revealtype, function(){

			if (config.revealtype=="mouseenter"){

				clearTimeout(config.revealdelay)

				var headerindex=parseInt($(this).attr("headerindex"))

				config.revealdelay=setTimeout(function(){ddaccordion.expandone(config["headerclass"], headerindex)}, config.mouseoverdelay || 0)

			}

			else{

				$(this).trigger("evt_accordion", [true]) //last parameter indicates this is a direct click on the header

				return false //cancel default click behavior

			}

		})

		$headers.bind("mouseleave", function(){

			clearTimeout(config.revealdelay)

		})

		config.oninit($headers.get(), expandedindices)

		$(window).bind('unload', function(){ //clean up and persist on page unload

			$headers.unbind()

			var expandedindices=[]

			$subcontents.filter(':visible').each(function(index){ //get indices of expanded headers

				expandedindices.push($(this).attr('contentindex'))

			})

			if (config.persiststate==true && $headers.length>0){ //persist state?

				expandedindices=(expandedindices.length==0)? '-1c' : expandedindices //No contents expanded, indicate that with dummy '-1c' value?

				ddaccordion.setCookie(config.headerclass, expandedindices)

			}

		})

	})

	}

}



//preload any images defined inside ajaxloadingmsg variable

ddaccordion.preloadimages(jQuery(ddaccordion.ajaxloadingmsg).filter('img'))