//** Featured Content Slider script- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)

//** Last updated: Nov 3rd- 07- Added optional fade transition effect.



////Ajax related settings

var csbustcachevar=0 //bust potential caching of external pages after initial Ajax request? (1=yes, 0=no)

var enabletransition=1 //enable fade into view transition effect? (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, customPaginateText, customNextText){

	var slider=document.getElementById(sliderid)

	if (typeof customPaginateText!="undefined" && customPaginateText!="") //Custom array of pagination links text defined?

		slider.paginateText=customPaginateText

	if (typeof customNextText!="Próximo" && customNextText!="") //Custom HTML for "Next" link defined?

		slider.nextText=customNextText

	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")

	for (var i=0; i<alldivs.length; i++){

		if (alldivs[i].className=="opacitylayer")

			slider.opacitylayer=alldivs[i]

		else if (alldivs[i].className=="contentdiv"){

			slidernodes[sliderid].push(alldivs[i]) //add this DIV reference to array

			if (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)

	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.buildpagination=function(sliderid){

	var slider=document.getElementById(sliderid)

	var paginatediv=document.getElementById("paginate-"+sliderid) //reference corresponding pagination DIV for slider

	var pcontent=""

	for (var i=0; i<slidernodes[sliderid].length; i++) //For each DIV within slider, generate a pagination link

		pcontent+='<a href="#" 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\">'+(slider.nextText || "Próximo")+'</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 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

	if (enabletransition){

		if (window[sliderid+"fadetimer"])

			clearTimeout(window[sliderid+"fadetimer"])

		this.setopacity(sliderid, 0.1)

	}

	slidernodes[sliderid][thepage].style.display="block" //show selected DIV

	if (enabletransition)

		this.fadeup(sliderid, thepage)

	//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)

	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.setopacity=function(sliderid, value){ //Sets the opacity of targetobject based on the passed in value setting (0 to 1 and in between)

	var targetobject=document.getElementById(sliderid).opacitylayer || null //reference slider container itself

	if (targetobject && 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 (targetobject && typeof targetobject.style.MozOpacity!="undefined") //Old Mozilla syntax

		targetobject.style.MozOpacity=value

	else if (targetobject && typeof targetobject.style.opacity!="undefined") //Standard opacity syntax

		targetobject.style.opacity=value

	targetobject.currentopacity=value

}



ContentSlider.fadeup=function(sliderid){

	var targetobject=document.getElementById(sliderid).opacitylayer || null //reference slider container itself

	if (targetobject && targetobject.currentopacity<1){

		this.setopacity(sliderid, targetobject.currentopacity+0.1)

		window[sliderid+"fadetimer"]=setTimeout(function(){ContentSlider.fadeup(sliderid)}, 100)

	}

}



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){

	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)

	}

	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){

	if (page_request.readyState == 4 && (page_request.status==200 || window.location.href.indexOf("http")==-1))

		thediv.innerHTML=page_request.responseText

}



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

		}

	}

}