//** 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: true, //bust caching of external ajax page after 1st request?
    enablepersist: true, //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("slider1").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
            }
        }
       var allcontentdivs = document.getElementById("slider1titles").getElementsByTagName("div")
        for (var i = 0; i < allcontentdivs.length; i++){
            if (this.css(allcontentdivs[i], "contentdiv", "check")){ //check for DIVs with class "contentdiv"
                setting.contenttitledivs.push(allcontentdivs[i])
                allcontentdivs[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"><font color="white">'+nextprev[0]+'</font></a> ' : '') + phtml + (nextprev[1]!=''? '<a href="#next" class="next"><font color="white">'+nextprev[1]+'</font></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
        setting.contenttitledivs[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.contenttitledivs[setting.prevpage-1].style.display="none"
            setting.onChange(setting.prevpage, setting.currentpage)
        }
        setting.contentdivs[turntopage-1].style.visibility="visible"
        setting.contentdivs[turntopage-1].style.display="block"

        setting.contenttitledivs[turntopage-1].style.visibility="visible"
        setting.contenttitledivs[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]
        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
    },

    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!=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.contenttitledivs=[]
        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)
    }
}