//** Featured Content Slider script- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)
//** Updated: Feb 28th- 07- Added ability to customize pagination links' text
//** Last updated: Aug 1st- 07- Gets content from single external file, added back button and pause/go

////Ajax related settings
var csbustcachevar=0 //bust potential caching of external pages after initial Ajax request? (1=yes, 0=no)
var csloadstatustext="<img src='loading.gif' /> Requesting content..." //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, controlsarray, singleexternalsource){
	var getfromsinglesource=typeof singleexternalsource!="undefined" && singleexternalsource!=""
	var slider=document.getElementById(sliderid)
	slider.controls=controlsarray
	slider.currentstate=(typeof autorun=="number" && autorun>0)? "pause" : "play"
	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")
	if (getfromsinglesource && alldivs.length==0){
		slider.innerHTML="" //empty slider DIV while it gets data from single external file
		ContentSlider.ajaxpage(singleexternalsource, slider, function(){ContentSlider(sliderid, autorun, controlsarray, singleexternalsource)})
	}
	else{
		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 (!getfromsinglesource && 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, autorun)
		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.checkdownloadcomplete=function(slider_divs){
	return (slider_divs.length)
}

ContentSlider.buildpagination=function(sliderid, autorun){
	var slider=document.getElementById(sliderid)
	var paginatediv=document.getElementById("paginate-"+sliderid) //reference corresponding pagination DIV for slider
	var pcontent=""
	pcontent+='<span class="navbutton" style="font-weight:bold" onClick=\"ContentSlider.pauseplay(\''+sliderid+'\', '+autorun+', this, event); return false\"><img src="'+slider.controls[0]+'" /></span> ' //Auto/Pause Button
	pcontent+='<span class="navbutton" style="font-weight:bold" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\'))); return false\"><img src="'+slider.controls[2]+'" /></span> ' //Back Button
	for (var i=0; i<slidernodes[sliderid].length; i++) //For each DIV within slider, generate a pagination link
		pcontent+='<a href="#" style="display:none" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', '+i+'); return false\">'+(slider.paginateText? slider.paginateText[i] : i+1)+'</a> '
	pcontent+='<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\'))); return false\"><img src="'+slider.controls[3]+'" /></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 backandautocontrols=document.getElementById("paginate-"+sliderid).getElementsByTagName("span") //gather "auto" and "back" span controls
	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)
	backandautocontrols[1].setAttribute("rel", thenextpage=(thepage>=1)? thepage-1 : paginatelinks.length-2) //Set "Back" control rel attribute
	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)
}

ContentSlider.pauseplay=function(sliderid, autorunperiod, controlobj, e){ //Pause or Play function
	if (e.stopPropagation)
		e.stopPropagation()
	else
		e.cancelBubble=true
	var slider=document.getElementById(sliderid)
	if (slider.currentstate=="pause"){ //if pause button
		clearTimeout(window[sliderid+"timer"])
		controlobj.firstChild.src=slider.controls[1]
		slider.currentstate="play"
	}
	else{
		ContentSlider.autoturnpage(sliderid, autorunperiod)
		controlobj.firstChild.src=slider.controls[0]
		slider.currentstate="pause"
	}
}

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, functionref){
	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, functionref)
	}
	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, functionref){
	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1)){
		thediv.innerHTML=page_request.responseText
	if (typeof functionref!="undefined")
		functionref()
	}
}

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
		}
	}
}