////Ajax related settings
var csbustcachevar = 1 //bust potential caching of external pages after initial Ajax request? (1=yes, 0=no)
var csloadstatustext = "<img src='images/loading.gif' /> Carregando..." //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"]

////NO NEED TO EDIT BELOW////////////////////////
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) {
    var slider = document.getElementById(sliderid)
    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 == "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 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 += '<span><a href="#" onClick=\"ContentSlider.turnpage(\'' + sliderid + '\', ' + i + '); return false\">' + (i + 1) + '</a></span>'
    pcontent += '<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\'' + sliderid + '\', parseInt(this.getAttribute(\'rel\'))); return false\"></a>'
    paginatediv.innerHTML = 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
    slidernodes[sliderid][thepage].style.display = "block" //show selected DIV
    //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)
}

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
        }
    }
}