//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 initialized, 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)





//April 9th, 08': Fixed "defaultexpanded" setting not working when page first loads





//Version 1.4: June 4th, 08':


//**1) Added option to activate a header "mouseover" instead of the default "click"


//**2) Bug persistence not working when used with jquery 1.2.6





//Version 1.5: June 20th, 08':


//**1) Adds new "onemustopen:true/false" parameter, which lets you set whether at least one header should be open at all times (so never all closed).


//**2) Changed cookie path to site wide for persistence feature


//**3) Fixed bug so "expandedindices" parameter in oninit(headers, expandedindices) returns empty array [] instead of [-1] when no expanded headers found





//Version 1.5.1: June 27th, 08': Fixed "defaultexpanded" setting not working properly when used with jquery 1.2.6





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'))).trigger("evt_accordion")


		})


	},





	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'))).trigger("evt_accordion")


		})


	},





	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.trigger("evt_accordion")


	},





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


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


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


	},





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


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


		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 + "; 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('<\/style>')


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


		ddaccordion.urlparamselect(config.headerclass)


		var persistedheaders=ddaccordion.getCookie(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.revealtype=/^(click)|(mouseover)$/i.test(config.revealtype)? config.revealtype.replace(/mouseover/i, "mouseenter") : "click"


		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]


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


		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]


		$('.'+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)


			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)


				if (config.animatedefault==false)


					$subcontent.show()


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


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


			}


		})


		$('.'+config["headerclass"]).bind("evt_accordion", function(){ //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) //Last Boolean value 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{


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


				}


 		})


		$('.'+config["headerclass"]).bind(config.revealtype, function(){


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


				ddaccordion.expandone(config["headerclass"], parseInt($(this).attr("headerindex")))


			}


			else{


				$(this).trigger("evt_accordion")


				return false //cancel default click behavior


			}


		})


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


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


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


			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)


			}


		})


	})


	}


}