var ddaccordion={
	ajaxloadingmsg: '<img src="loading2.gif" /><br />Loading...',
	headergroup: {},
	contentgroup: {},

preloadimages:function($images){
	$images.each(function(){
	var preloadimage=new Image()
	preloadimage.src=this.src
	})
},

expandone:function(headerclass, selected){
	this.toggleone(headerclass, selected, "expand")
},

collapseone:function(headerclass, selected){
	this.toggleone(headerclass, selected, "collapse")
},

expandall:function(headerclass){
	var $headers=this.headergroup[headerclass]
	this.contentgroup[headerclass].filter(':hidden').each(function(){
		$headers.eq(parseInt($(this).attr('contentindex'))).trigger("evt_accordion")
	})
},

collapseall:function(headerclass){
	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){
	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){
	if (content){
		ajaxinfo.cacheddata=content
		ajaxinfo.status="cached"
		if ($targetContent.queue("fx").length==0){
			$targetContent.hide().html(content)
			ajaxinfo.status="complete"
			callback()
		}
	}
	if (ajaxinfo.status!="complete"){
		setTimeout(function(){handlecontent(ajaxinfo.cacheddata)}, 100)
	}
}

if (ajaxinfo.status=="none"){
	$targetContent.html(this.ajaxloadingmsg)
	$targetContent.slideDown(config.animatespeed)
	ajaxinfo.status="loading"
	$.ajax({
		url: ajaxinfo.url,
		error:function(ajaxrequest){
			handlecontent('Error fetching content. Server Response: '+ajaxrequest.responseText)
		},
		success:function(content){
			content=(content=="")? " " : content
			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 (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')), $targetContent.css('display'), useractivated)
		if (config.postreveal=="gotourl" && directclick){
			var targetLink=($targetHeader.is("a"))? $targetHeader.get(0) : $targetHeader.find('a:eq(0)').get(0)
			if (targetLink)
				setTimeout(function(){location=targetLink.href}, 200)
		}
	})
},

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)
	.removeClass((state=="expand")? config.cssclass.collapse : config.cssclass.expand)
	if (config.htmlsetting.location=='src'){
		$targetHeader=($targetHeader.is("img"))? $targetHeader : $targetHeader.find('img').eq(0)
		$targetHeader.attr('src', (state=="expand")? config.htmlsetting.expand : config.htmlsetting.collapse)
	}
	else if (config.htmlsetting.location=="prefix")
		$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"))
	if (result!=null)
		result=RegExp.$1.split(',')
	return result
},

	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'))

ddaccordion.init({
	headerclass: "submenuheader", //Shared CSS class name of headers group
	contentclass: "submenu", //Shared CSS class name of contents group
	revealtype: "click", //Reveal content when user clicks or onmouseover the header? Valid value: "click", "clickgo", or "mouseover"
	mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover
	collapseprev: true, //Collapse previous content (so only one open at any time)? true/false 
	defaultexpanded: [], //index of content(s) open by default [index1, index2, etc] [] denotes no content
	onemustopen: false, //Specify whether at least one header should be open always (so never all headers closed)
	animatedefault: true, //Should contents open by default be animated into view?
	persiststate: true, //persist state of opened contents within browser session?
	toggleclass: ["", ""], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]
	togglehtml: ["suffix", "", ""], //Additional HTML added to the header when it's collapsed and expanded, respectively  ["position", "html1", "html2"] (see docs)
	animatespeed: "fast", //(ie: 200), or keywords "fast", "normal", or "slow"
	oninit:function(headers, expandedindices){
	},
	onopenclose:function(header, index, state, isuseractivated){
	}
})