//** 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



//**1) Version 1.5.1: June 27th, 08': Fixed "defaultexpanded" setting not working properly when used with jquery 1.2.6



//Version 1.6: Oct 3rd, 08':

//**1) Adds new "mouseoverdelay" param that sets delay before headers are activated when "revealtype" param is set to "mouseover"

//**2) Fixed bug with "onemustopen" param not working properly when "revealtype" is set to "click"





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 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

                }

            })

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

                    return false //cancel default click behavior

                }

            })

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

                clearTimeout(config.revealdelay)

            })

            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)

                }

            })

        })

    }

}







//Initialize 2nd demo:

ddaccordion.init({

    headerclass: "trigger", //Shared CSS class name of headers group

    contentclass: "content", //Shared CSS class name of contents group

    revealtype: "click", //Reveal content when user clicks or onmouseover the header? Valid value: "click" or "mouseover"

    mouseoverdelay: 200, //if revealtype="mouseover", set delay in milliseconds before header expands onMouseover

    collapseprev: false, //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: false, //Should contents open by default be animated into view?

    persiststate: false, //persist state of opened contents within browser session?

    toggleclass: ["closedcontent", "opencontent"], //Two CSS classes to be applied to the header when it's collapsed and expanded, respectively ["class1", "class2"]

    togglehtml: ["prefix", "<img src='../media/closed.gif' /> More", "<img src='../media/open.gif'' /> Less"], //Additional HTML added to the header when it's collapsed and expanded, respectively  ["position", "html1", "html2"] (see docs)

    animatespeed: "fast", //speed of animation: integer in milliseconds (ie: 200), or keywords "fast", "normal", or "slow"

    oninit:function(expandedindices){ //custom code to run when headers have initalized
    //do nothing
    },
    onopenclose:function(header, index, state, isuseractivated){ //custom code to run whenever a header is opened or closed
    //do nothing
    }
})