//** 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: 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]
		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)
	}

}