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

//Created: Jan 7th, 08'

//Version 1.3: April 3rd, 08':

//**1) Script now no longer conflicts with other JS frameworks

//**2) Adds custom oninit() and onopenclose() event handlers that fire when Accordion Content instance has initalized, plus whenever a header is opened/closed

//**3) Adds support for expanding header(s) using the URL parameter (ie: http://mysite.com/accordion.htm?headerclass=0,1) 



jQuery.noConflict()



var ddaccordion={

	

	contentclassname:{}, //object to store corresponding contentclass name based on headerclass



	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 $=jQuery

		var $headers=$('.'+headerclass)

		$('.'+this.contentclassname[headerclass]+':hidden').each(function(){

			$headers.eq(parseInt($(this).attr('contentindex'))).click()

		})

	},



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

		var $=jQuery

		var $headers=$('.'+headerclass)

		$('.'+this.contentclassname[headerclass]+':visible').each(function(){

			$headers.eq(parseInt($(this).attr('contentindex'))).click()

		})

	},



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

		var $=jQuery

		var $targetHeader=$('.'+headerclass).eq(selected)

		var $subcontent=$('.'+this.contentclassname[headerclass]).eq(selected)

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

			$targetHeader.click()

	},



	expandit:function($targetHeader, $targetContent, config, isclicked){

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

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

	},



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

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

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

	},



	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

	},



	init:function(config){

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

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

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

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

		ddaccordion.urlparamselect(config.headerclass)

		ddaccordion.contentclassname[config.headerclass]=config.contentclass //remember contentclass name based on headerclass

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

		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)? ddaccordion.getCookie(config.headerclass) : config.defaultexpanded)

		if (typeof expandedindices=='string') //test for valid cookie ('string'), invalid being null or 1st page load

			expandedindices=expandedindices.replace(/c/ig, '').split(',') //if valid, change to array value

		var $subcontents=$('.'+config["contentclass"])

		if (!(expandedindices instanceof Array)) //check for invalid expandedindices value

			expandedindices=[]

		if (config["collapseprev"] && expandedindices.length>1)

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

		$('.'+config["headerclass"]).each(function(index){ //loop through all headers

			if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && $(this).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)

			}

			$(this).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)

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

				if (config.animatedefault==false)

					$subcontent.show()

				ddaccordion.expandit($(this), $subcontent, config, false) //Last Boolean value sets 'isclicked' parameter

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

			}  //end check

			else{

				$subcontent.hide()

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

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

			}

		})

		$('.'+config["headerclass"]).click(function(){ //assign behavior when headers are clicked on

				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) //Last Boolean value sets 'isclicked' 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 'isclicked' parameter

					}

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

				}

				else{

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

				}

				return false

 	})

		config.oninit($('.'+config["headerclass"]).get(), expandedindices)

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

			$('.'+config["headerclass"]).unbind('click')

			var expandedindices=[]

			$('.'+config["contentclass"]+":visible").each(function(index){ //get indices of expanded headers

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

			})

			if (config.persiststate==true){ //persist state?

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

				ddaccordion.setCookie(config.headerclass, expandedindices)

			}

		})

	})

	}

}