//** 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="http://www.ungarn-info.de/aktion/loading2.gif" /><br />Daten werden geladen...', //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'))