//** Featured Content Slider script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com.
//** May 2nd, 08'- Script rewritten and updated to 2.0.
//** June 12th, 08'- Script updated to v 2.3, which adds the following features:
	//1) Changed behavior of script to actually collapse the previous content when the active one is shown, instead of just tucking it underneath the later.
	//2) Added setting to reveal a content either via "click" or "mouseover" of pagination links (default is former).
	//3) Added public function for jumping to a particular slide within a Featured Content instance using an arbitrary link, for example.

//** July 11th, 08'- Script updated to v 2.4:
	//1) Added ability to select a particular slide when the page first loads using a URL parameter (ie: mypage.htm?myslider=4 to select 4th slide in "myslider")
	//2) Fixed bug where the first slide disappears when the mouse clicks or mouses over it when page first loads.

var featuredcontentslider = {

    //3 variables below you can customize if desired:
ajaxloadingmsg: '<div style="margin: 20px 0 0 20px"><img src="loading.gif" /> Fetching slider Contents. Please wait...</div>',
    bustajaxcache: false, //bust caching of external ajax page after 1st request?
    enablepersist: false, //persist to last content viewed when returning to page?

    settingcaches: {}, //object to cache "setting" object of each script instance

    jumpTo: function(fcsid, pagenumber) { //public function to go to a slide manually.
        this.turnpage(this.settingcaches[fcsid], pagenumber)
    },

    ajaxconnect: function(setting) {
        var page_request = false
        if (window.ActiveXObject) { //Test for support for ActiveXObject in IE first (as XMLHttpRequest in IE7 is broken)
            try {
                page_request = new ActiveXObject("Msxml2.XMLHTTP")
            }
            catch (e) {
                try {
                    page_request = new ActiveXObject("Microsoft.XMLHTTP")
                }
                catch (e) { }
            }
        }
        else if (window.XMLHttpRequest) // if Mozilla, Safari etc
            page_request = new XMLHttpRequest()
        else
            return false
        var pageurl = setting.contentsource[1]
        page_request.onreadystatechange = function() {
            featuredcontentslider.ajaxpopulate(page_request, setting)
        }
        document.getElementById(setting.id).innerHTML = this.ajaxloadingmsg
        var bustcache = (!this.bustajaxcache) ? "" : (pageurl.indexOf("?") != -1) ? "&" + new Date().getTime() : "?" + new Date().getTime()
        page_request.open('GET', pageurl + bustcache, true)
        page_request.send(null)
    },

    ajaxpopulate: function(page_request, setting) {
        if (page_request.readyState == 4 && (page_request.status == 200 || window.location.href.indexOf("http") == -1)) {
            document.getElementById(setting.id).innerHTML = page_request.responseText
            this.buildpaginate(setting)
        }
    },

    buildcontentdivs: function(setting) {
        var alldivs = document.getElementById(setting.id).getElementsByTagName("div")
        for (var i = 0; i < alldivs.length; i++) {
            if (this.css(alldivs[i], "contentdiv", "check")) { //check for DIVs with class "contentdiv"
                setting.contentdivs.push(alldivs[i])
                alldivs[i].style.display = "none" //collapse all content DIVs to begin with
            }
        }
    },

    buildpaginate: function(setting) {
        this.buildcontentdivs(setting)
        var sliderdiv = document.getElementById(setting.id)
        var pdiv = document.getElementById("paginate-" + setting.id)
        var phtml = ""
        var toc = setting.toc
        var nextprev = setting.nextprev
        if (typeof toc == "string" && toc != "markup" || typeof toc == "object") {
            for (var i = 1; i <= setting.contentdivs.length; i++) {
                phtml += '<a href="#' + i + '" class="toc">' + (typeof toc == "string" ? toc.replace(/#increment/, i) : toc[i - 1]) + '</a> '
            }
            phtml = (nextprev[0] != '' ? '<a href="#prev" class="prev">' + nextprev[0] + '</a> ' : '') + phtml + (nextprev[1] != '' ? '<a href="#next" class="next">' + nextprev[1] + '</a>' : '')
            pdiv.innerHTML = phtml
        }
        var pdivlinks = pdiv.getElementsByTagName("a")
        var toclinkscount = 0 //var to keep track of actual # of toc links
        for (var i = 0; i < pdivlinks.length; i++) {
            if (this.css(pdivlinks[i], "toc", "check")) {
                if (toclinkscount > setting.contentdivs.length - 1) { //if this toc link is out of range (user defined more toc links then there are contents)
                    pdivlinks[i].style.display = "none" //hide this toc link
                    continue
                }
                pdivlinks[i].setAttribute("rel", ++toclinkscount) //store page number inside toc link
                pdivlinks[i][setting.revealtype] = function() {
                    featuredcontentslider.turnpage(setting, this.getAttribute("rel"))
                    return false
                }
                setting.toclinks.push(pdivlinks[i])
            }
            else if (this.css(pdivlinks[i], "prev", "check") || this.css(pdivlinks[i], "next", "check")) { //check for links with class "prev" or "next"
                pdivlinks[i].onclick = function() {
                    featuredcontentslider.turnpage(setting, this.className)
                    return false
                }
            }
        }
        this.turnpage(setting, setting.currentpage, true)
        if (setting.autorotate[0]) { //if auto rotate enabled
            pdiv[setting.revealtype] = function() {
                featuredcontentslider.cleartimer(setting, window["fcsautorun" + setting.id])
            }
            sliderdiv["onclick"] = function() { //stop content slider when slides themselves are clicked on
                featuredcontentslider.cleartimer(setting, window["fcsautorun" + setting.id])
            }
            setting.autorotate[1] = setting.autorotate[1] + (1 / setting.enablefade[1] * 50) //add time to run fade animation (roughly) to delay between rotation
            this.autorotate(setting)
        }
    },

    urlparamselect: function(fcsid) {
        var result = window.location.search.match(new RegExp(fcsid + "=(\\d+)", "i")) //check for "?featuredcontentsliderid=2" in URL
        return (result == null) ? null : parseInt(RegExp.$1) //returns null or index, where index (int) is the selected tab's index
    },

    turnpage: function(setting, thepage, autocall) {
        var currentpage = setting.currentpage //current page # before change
        var totalpages = setting.contentdivs.length
        var turntopage = (/prev/i.test(thepage)) ? currentpage - 1 : (/next/i.test(thepage)) ? currentpage + 1 : parseInt(thepage)
        turntopage = (turntopage < 1) ? totalpages : (turntopage > totalpages) ? 1 : turntopage //test for out of bound and adjust
        if (turntopage == setting.currentpage && typeof autocall == "undefined") //if a pagination link is clicked on repeatedly
            return
        setting.currentpage = turntopage
        setting.contentdivs[turntopage - 1].style.zIndex = ++setting.topzindex
        this.cleartimer(setting, window["fcsfade" + setting.id])
        setting.cacheprevpage = setting.prevpage
        if (setting.enablefade[0] == true) {
            setting.curopacity = 0
            this.fadeup(setting)
        }
        if (setting.enablefade[0] == false) { //if fade is disabled, fire onChange event immediately (verus after fade is complete)
            setting.contentdivs[setting.prevpage - 1].style.display = "none" //collapse last content div shown (it was set to "block")
            setting.onChange(setting.prevpage, setting.currentpage)
        }
        setting.contentdivs[turntopage - 1].style.visibility = "visible"
        setting.contentdivs[turntopage - 1].style.display = "block"
        if (setting.prevpage <= setting.toclinks.length) //make sure pagination link exists (may not if manually defined via "markup", and user omitted)
            this.css(setting.toclinks[setting.prevpage - 1], "selected", "remove")
        if (turntopage <= setting.toclinks.length) //make sure pagination link exists (may not if manually defined via "markup", and user omitted)
            this.css(setting.toclinks[turntopage - 1], "selected", "add")
        setting.prevpage = turntopage
        if (this.enablepersist)
            this.setCookie("fcspersist" + setting.id, turntopage)
    },

    setopacity: function(setting, value) { //Sets the opacity of targetobject based on the passed in value setting (0 to 1 and in between)
        var targetobject = setting.contentdivs[setting.currentpage - 1]
        try{
        if (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 (typeof targetobject.style.MozOpacity != "undefined") //Old Mozilla syntax
            targetobject.style.MozOpacity = value
        else if (typeof targetobject.style.opacity != "undefined") //Standard opacity syntax
            targetobject.style.opacity = value
        setting.curopacity = value
        }
        catch(e){}
    },

    fadeup: function(setting) {
        if (setting.curopacity < 1) {
            this.setopacity(setting, setting.curopacity + setting.enablefade[1])
            window["fcsfade" + setting.id] = setTimeout(function() { featuredcontentslider.fadeup(setting) }, 50)
        }
        else { //when fade is complete
            if (setting.cacheprevpage != setting.currentpage) //if previous content isn't the same as the current shown div (happens the first time the page loads/ script is run)
                setting.contentdivs[setting.cacheprevpage - 1].style.display = "none" //collapse last content div shown (it was set to "block")
            setting.onChange(setting.cacheprevpage, setting.currentpage)
        }
    },

    cleartimer: function(setting, timervar) {
        if (typeof timervar != "undefined") {
            clearTimeout(timervar)
            clearInterval(timervar)
            if (setting.cacheprevpage != null && setting.cacheprevpage != setting.currentpage) { //if previous content isn't the same as the current shown div
                setting.contentdivs[setting.cacheprevpage - 1].style.display = "none"
            }
        }
    },

    css: function(el, targetclass, action) {
        var needle = new RegExp("(^|\\s+)" + targetclass + "($|\\s+)", "ig")
        if (action == "check")
            return needle.test(el.className)
        else if (action == "remove")
            el.className = el.className.replace(needle, "")
        else if (action == "add")
            el.className += " " + targetclass
    },

    autorotate: function(setting) {
        window["fcsautorun" + setting.id] = setInterval(function() { featuredcontentslider.turnpage(setting, "next") }, setting.autorotate[1])
    },

    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(setting) {
        var persistedpage = this.getCookie("fcspersist" + setting.id) || 1
        var urlselectedpage = this.urlparamselect(setting.id) //returns null or index from: mypage.htm?featuredcontentsliderid=index
        this.settingcaches[setting.id] = setting //cache "setting" object
        setting.contentdivs = []
        setting.toclinks = []
        setting.topzindex = 0
        setting.currentpage = urlselectedpage || ((this.enablepersist) ? persistedpage : 1)
        setting.prevpage = setting.currentpage
        setting.revealtype = "on" + (setting.revealtype || "click")
        setting.curopacity = 0
        setting.onChange = setting.onChange || function() { }
        if (setting.contentsource[0] == "inline")
            this.buildpaginate(setting)
        if (setting.contentsource[0] == "ajax")
            this.ajaxconnect(setting)
    }

}