//** 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(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)
    }

    if (setting.contentdivs[turntopage - 1].id != "") {
      if (setting.contentdivs[turntopage - 1].childNodes[1]) {
        setting.contentdivs[turntopage - 1].childNodes[1].style.backgroundImage = "url(" + setting.contentdivs[turntopage - 1].id + ")"
      } else {
        setting.contentdivs[turntopage - 1].childNodes[0].style.backgroundImage = "url(" + setting.contentdivs[turntopage - 1].id + ")"
      }
    }
    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]
    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.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)
  }

}