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