//Accordion Content script: By Dynamic Drive, at http://www.dynamicdrive.com
//Created: Jan 7th, 08'

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 $headers=jQuery('.'+headerclass)
                jQuery('.'+this.contentclassname[headerclass]+':hidden').each(function(){
                        $headers.eq(parseInt(jQuery(this).attr('contentindex'))).click()
                })
        },

        collapseall:function(headerclass){ //PUBLIC function to collapse all headers based on their shared CSS classname
                var $headers=jQuery('.'+headerclass)
                jQuery('.'+this.contentclassname[headerclass]+':visible').each(function(){
                        $headers.eq(parseInt(jQuery(this).attr('contentindex'))).click()
                })
        },

        toggleone:function(headerclass, selected, optstate){ //PUBLIC function to expand/ collapse a particular header
                var $targetHeader=jQuery('.'+headerclass).eq(selected)
                var $subcontent=jQuery('.'+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){
                $targetContent.slideDown(config.animatespeed)
                this.transformHeader($targetHeader, config, "expand")
        },

        collapseit:function($targetHeader, $targetContent, config){
                $targetContent.slideUp(config.animatespeed)
                this.transformHeader($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)
        },

        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.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
                var lastexpanded={} //object to hold reference to last expanded header and content (jquery objects)
                var expandedindices=(config.persiststate)? ddaccordion.getCookie(config.headerclass) : config.defaultexpanded
                expandedindices=(typeof expandedindices=='string')? expandedindices.replace(/c/ig, '').split(',') : config.defaultexpanded //test for valid cookie ('string'), otherwise (null, or 1st page load), default to defaultexpanded setting
                var $subcontents=jQuery('.'+config["contentclass"])
                if (config["collapseprev"] && expandedindices.length>1)
                        expandedindices=[expandedindices.pop()] //return last array element as an array (for sake of jQuery.inArray())
                jQuery('.'+config["headerclass"]).each(function(index){ //loop through all headers
                        if (/(prefix)|(suffix)/i.test(config.htmlsetting.location) && jQuery(this).html()!=""){ //add a SPAN element to header depending on user setting and if header is a container tag
                                jQuery('<span class="accordprefix"></span>').prependTo(this)
                                jQuery('<span class="accordsuffix"></span>').appendTo(this)
                        }
                        jQuery(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(jQuery(this), $subcontent, config)
                                lastexpanded={$header:jQuery(this), $content:$subcontent}
                        }  //end check
                        else{
                                $subcontent.hide()
                                ddaccordion.transformHeader(jQuery(this), config, "collapse")
                        }
                })
                jQuery('.'+config["headerclass"]).click(function(){ //assign behavior when headers are clicked on
                                var $subcontent=$subcontents.eq(parseInt(jQuery(this).attr('headerindex'))) //get subcontent that should be expanded/collapsed
                                if ($subcontent.css('display')=="none"){
                                        ddaccordion.expandit(jQuery(this), $subcontent, config)
                                        if (config["collapseprev"] && lastexpanded.$header && jQuery(this).get(0)!=lastexpanded.$header.get(0)){ //collapse previous content?
                                                ddaccordion.collapseit(lastexpanded.$header, lastexpanded.$content, config)
                                        }
                                        lastexpanded={$header:jQuery(this), $content:$subcontent}
                                }
                                else{
                                        ddaccordion.collapseit(jQuery(this), $subcontent, config)
                                }
                                return false
         })
                jQuery(window).bind('unload', function(){ //clean up and persist on page unload
                        jQuery('.'+config["headerclass"]).unbind('click')
                        var expandedindices=[]
                        jQuery('.'+config["contentclass"]+":visible").each(function(index){ //get indices of expanded headers
                                expandedindices.push(jQuery(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)
                        }
                })
        })
        }
}