var csbustcachevar=0 //bust potential caching of external pages after initial Ajax request? (1=yes, 0=no)
var enabletransition=1 //enable fade into view transition effect? (1=yes, 0=no)
var csloadstatustext="<img src='loading.gif' /> Requesting content..." //HTML to indicate Ajax page is being fetched
var csexternalfiles=[] //External .css or .js files to load to style the external content(s), if any. Separate multiple files with comma ie: ["cat.css", dog.js"]
var paginationtitle="MyPIN Aktuell"

var enablepersist=true
var slidernodes=new Object() //Object array to store references to each content slider's DIV containers (<div class="contentdiv">)
var csloadedobjects="" //Variable to store file names of .js/.css files already loaded (if Ajax is used)

function ContentSlider(sliderid, autorun, customPaginateText, customNextText){
        var slider=document.getElementById(sliderid)
        if (typeof customPaginateText!="undefined" && customPaginateText!="") //Custom array of pagination links text defined?
                slider.paginateText=customPaginateText
        if (typeof customNextText!="undefined" && customNextText!="") //Custom HTML for "Next" link defined?
                slider.nextText=customNextText
        slidernodes[sliderid]=[] //Array to store references to this content slider's DIV containers (<div class="contentdiv">)
        ContentSlider.loadobjects(csexternalfiles) //Load external .js and .css files, if any
        var alldivs=slider.getElementsByTagName("div")
        for (var i=0; i<alldivs.length; i++){
                if (alldivs[i].className=="opacitylayer")
                        slider.opacitylayer=alldivs[i]
                else if (alldivs[i].className=="contentdiv"){
                        slidernodes[sliderid].push(alldivs[i]) //add this DIV reference to array
                        if (typeof alldivs[i].getAttribute("rel")=="string") //If get this DIV's content via Ajax (rel attr contains path to external page)
                                ContentSlider.ajaxpage(alldivs[i].getAttribute("rel"), alldivs[i])
                }
        }
        ContentSlider.buildpagination(sliderid)
        var loadfirstcontent=true
        if (enablepersist && getCookie(sliderid)!=""){ //if enablepersist is true and cookie contains corresponding value for slider
                var cookieval=getCookie(sliderid).split(":") //process cookie value ([sliderid, int_pagenumber (div content to jump to)]
                if (document.getElementById(cookieval[0])!=null && typeof slidernodes[sliderid][cookieval[1]]!="undefined"){ //check cookie value for validity
                        ContentSlider.turnpage(cookieval[0], parseInt(cookieval[1])) //restore content slider's last shown DIV
                        loadfirstcontent=false
                }
        }
        if (loadfirstcontent==true) //if enablepersist is false, or cookie value doesn't contain valid value for some reason (ie: user modified the structure of the HTML)
                ContentSlider.turnpage(sliderid, 0) //Display first DIV within slider
        if (typeof autorun=="number" && autorun>0) //if autorun parameter (int_miliseconds) is defined, fire auto run sequence
                window[sliderid+"timer"]=setTimeout(function(){ContentSlider.autoturnpage(sliderid, autorun)}, autorun)
}

ContentSlider.buildpagination=function(sliderid){
        var slider=document.getElementById(sliderid)
        var paginatediv=document.getElementById("paginate-"+sliderid) //reference corresponding pagination DIV for slider
        var pcontent=""
        for (var i=0; i<slidernodes[sliderid].length; i++) //For each DIV within slider, generate a pagination link
                pcontent+='<a href="#" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', '+i+'); return false\">'+(slider.paginateText? slider.paginateText[i] : i+1)+'</a> '
        pcontent+='<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\'))); return false\">'+(slider.nextText || "Next")+'</a>'
        paginatediv.innerHTML='<span class="pagination_title">' + paginationtitle + '</span>' + pcontent
        paginatediv.onclick=function(){ //cancel auto run sequence (if defined) when user clicks on pagination DIV
        if (typeof window[sliderid+"timer"]!="undefined")
                clearTimeout(window[sliderid+"timer"])
        }
}

ContentSlider.turnpage=function(sliderid, thepage){
        var paginatelinks=document.getElementById("paginate-"+sliderid).getElementsByTagName("a") //gather pagination links
        for (var i=0; i<slidernodes[sliderid].length; i++){ //For each DIV within slider
                paginatelinks[i].className="" //empty corresponding pagination link's class name
                slidernodes[sliderid][i].style.display="none" //hide DIV
        }
        paginatelinks[thepage].className="selected" //for selected DIV, set corresponding pagination link's class name
        if (enabletransition){
                if (window[sliderid+"fadetimer"])
                        clearTimeout(window[sliderid+"fadetimer"])
                this.setopacity(sliderid, 0.1)
        }
        slidernodes[sliderid][thepage].style.display="block" //show selected DIV
        if (enabletransition)
                this.fadeup(sliderid, thepage)
        //Set "Next" pagination link's (last link within pagination DIV) "rel" attribute to the next DIV number to show
        paginatelinks[paginatelinks.length-1].setAttribute("rel", thenextpage=(thepage<paginatelinks.length-2)? thepage+1 : 0)
        if (enablepersist)
                setCookie(sliderid, sliderid+":"+thepage)
}

ContentSlider.autoturnpage=function(sliderid, autorunperiod){
        var paginatelinks=document.getElementById("paginate-"+sliderid).getElementsByTagName("a") //Get pagination links
        var nextpagenumber=parseInt(paginatelinks[paginatelinks.length-1].getAttribute("rel")) //Get page number of next DIV to show
        ContentSlider.turnpage(sliderid, nextpagenumber) //Show that DIV
        window[sliderid+"timer"]=setTimeout(function(){ContentSlider.autoturnpage(sliderid, autorunperiod)}, autorunperiod)
}

ContentSlider.setopacity=function(sliderid, value){ //Sets the opacity of targetobject based on the passed in value setting (0 to 1 and in between)
        var targetobject=document.getElementById(sliderid).opacitylayer || null //reference slider container itself
        if (targetobject && targetobject.filters && targetobject.filters[0]){ //IE syntax
                if (typeof targetobject.filters[0].opacity=="number") //IE6
                        targetobject.filters[0].opacity=value*100
                else //IE 5.5
                        targetobject.style.filter="alpha(opacity="+value*100+")"
                }
        else if (targetobject && typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax
                targetobject.style.MozOpacity=value
        else if (targetobject && typeof targetobject.style.opacity!="undefined") //Standard opacity syntax
                targetobject.style.opacity=value
        targetobject.currentopacity=value
}

ContentSlider.fadeup=function(sliderid){
        var targetobject=document.getElementById(sliderid).opacitylayer || null //reference slider container itself
        if (targetobject && targetobject.currentopacity<1){
                this.setopacity(sliderid, targetobject.currentopacity+0.1)
                window[sliderid+"fadetimer"]=setTimeout(function(){ContentSlider.fadeup(sliderid)}, 100)
        }
}

function getCookie(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 ""
}

function setCookie(name, value){
        document.cookie = name+"="+value
}

////////////////Ajax Related functions //////////////////////////////////

ContentSlider.ajaxpage=function(url, thediv){
        var page_request = false
        var bustcacheparameter=""
        if (window.XMLHttpRequest) // if Mozilla, Safari etc
                page_request = new XMLHttpRequest()
        else if (window.ActiveXObject){ // if IE
                try {
                page_request = new ActiveXObject("Msxml2.XMLHTTP")
                }
                catch (e){
                try{
                page_request = new ActiveXObject("Microsoft.XMLHTTP")
                }
                catch (e){}
                }
        }
        else
                return false
        thediv.innerHTML=csloadstatustext
        page_request.onreadystatechange=function(){
                ContentSlider.loadpage(page_request, thediv)
        }
        if (csbustcachevar) //if bust caching of external page
                bustcacheparameter=(url.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime()
        page_request.open('GET', url+bustcacheparameter, true)
        page_request.send(null)
}

ContentSlider.loadpage=function(page_request, thediv){
        if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))
                thediv.innerHTML=page_request.responseText
}

ContentSlider.loadobjects=function(externalfiles){ //function to load external .js and .css files. Parameter accepts a list of external files to load (array)
        for (var i=0; i<externalfiles.length; i++){
                var file=externalfiles[i]
                var fileref=""
                if (csloadedobjects.indexOf(file)==-1){ //Check to see if this object has not already been added to page before proceeding
                        if (file.indexOf(".js")!=-1){ //If object is a js file
                                fileref=document.createElement('script')
                                fileref.setAttribute("type","text/javascript");
                                fileref.setAttribute("src", file);
                        }
                        else if (file.indexOf(".css")!=-1){ //If object is a css file
                                fileref=document.createElement("link")
                                fileref.setAttribute("rel", "stylesheet");
                                fileref.setAttribute("type", "text/css");
                                fileref.setAttribute("href", file);
                        }
                }
                if (fileref!=""){
                        document.getElementsByTagName("head").item(0).appendChild(fileref)
                        csloadedobjects+=file+" " //Remember this object as being already added to page
                }
        }
}