//** Featured Content Slider script- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)
//** Last updated: Nov 3rd- 07- Added optional fade transition effect.
//** Last updated: Joseph Leung Nov 15 2007- Customized to 3 panels for IS

////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='images/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!="undefined" && 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=="contentdivRed") || (alldivs[i].className=="contentdivBlue") || (alldivs[i].className=="contentdivGreen") || (alldivs[i].className=="contentdivPurple") || (alldivs[i].className=="contentdivOrange") ){
			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])
			if (typeof alldivs[i].getAttribute("relb")=="string") //If get this DIV's content via Ajax (rel attr contains path to external page)
				ContentSlider.ajaxpage(alldivs[i].getAttribute("relb"), 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]), true) //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, true) //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){

  /* real left back button */
	var paginatedivl=document.getElementById("paginate-"+sliderid+"l") //reference corresponding pagination DIV for slider
	var pcontentl=""
	pcontentl+='<img src="images/spacer.gif" width="1" height="103px" border="0"><a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'relb\')), false); return false\"><img src="images/button/moreGrayLeftArrow.gif" border="0"></a>'
  	
	paginatedivl.innerHTML=pcontentl
	paginatedivl.onclick=function(){ //cancel auto run sequence (if defined) when user clicks on pagination DIV
	if (typeof window[sliderid+"timer"]!="undefined")
		clearTimeout(window[sliderid+"timer"])
	}

  /////////// all other buttons (all fake except for right arrow button)

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

  // fake left back button for tracking coding	
//	pcontent+='<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'relb\'))); return false\"><img src="images/button/moreGrayLeftArrow.gif" border="0"></a>'
	pcontent+='<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'relb\')), false); return false\"></a>'	
  	
	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="#" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', '+i+', true); return false\"></a>'		// have a fake link essentially
//	pcontent+='<a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\'))); return false\">'+(slider.nextText || "Next")+'</a>'

	pcontent+='<img src="images/spacer.gif" width="1" height="103px" border="0"><a href="#" style="font-weight: bold;" onClick=\"ContentSlider.turnpage(\''+sliderid+'\', parseInt(this.getAttribute(\'rel\')), true); return false\"><img src="images/button/moreGrayRightArrow.gif" border="0"></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, forwardDirection){ 
	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
		paginatelinks[i+1].className="" //empty corresponding pagination link's class name
		slidernodes[sliderid][i].style.display="none" //hide DIV
	}
	
	
//	alert(sliderid +"|"+ thepage+"|"+forwardDirection+"|"+paginatelinks.length+"|"+slidernodes[sliderid].length)
//  alert("m="+m+" | i="+i + " |"+eval(paginatelinks.length-3)+" |"+eval(thepage+1))
  
/*
//////// original one	
//	paginatelinks[thepage].className="selected" //for selected DIV, set corresponding pagination link's class name
  paginatelinks[thepage+1].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)
*/
			
//////////////////////////
	// want to show three at a time...
	/*
  if (!forwardDirection) {
    // need to wrap around to the end
    var i=(thepage-2>0)?(thepage-1) : paginatelinks.length-3)
    for (var m=0, i=; m<2, i<thepage; i--, m++){ //For each DIV within slider
      paginatelinks[i].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][i-1].style.display="block" //show selected DIV
    	if (enabletransition)
    		this.fadeup(sliderid, i-1)	       	
  	}     
  }    
  */
  var m=0;
  for (var i=(thepage+1); i<(paginatelinks.length-1); i++){ //For each DIV within slider
    paginatelinks[i].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][i-1].style.display="block" //show selected DIV
  	if (enabletransition)
  		this.fadeup(sliderid, i-1)	   
  		
  	m++
  	if (m>=2) // m>=3
  	 break;
	}  	
	/*
  if (m < 3 && forwardDirection) {
    // need to wrap around to the beginning
    for (var i=1; i < paginatelinks.length-1; i++){ //For each DIV within slider
      paginatelinks[i].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][i-1].style.display="block" //show selected DIV
    	if (enabletransition)
    		this.fadeup(sliderid, i-1)
        
    	m++
    	if (m>=2)
    	 break         	       	
  	}       
  }	*/
  
  /*
    if (!forwardDirection) {
    // need to wrap around to the beginning
    for (var i=paginatelinks.length-2; m<3, i>0; i--, m++){ //For each DIV within slider
      paginatelinks[i].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][i-1].style.display="block" //show selected DIV
    	if (enabletransition)
    		this.fadeup(sliderid, i-1)	       	
  	}     
  }    
  */

/*	
  paginatelinks[thepage+2].className="selected" //for selected DIV, set corresponding pagination link's class name
	if (enabletransition){
		if (window[sliderid+1+"fadetimer"])
			clearTimeout(window[sliderid+1+"fadetimer"])
		this.setopacity(sliderid+1, 0.1)
	}
	slidernodes[sliderid+1][thepage+1].style.display="block" //show selected DIV
	if (enabletransition)
		this.fadeup(sliderid+1, thepage+1)
    
  paginatelinks[thepage+3].className="selected" //for selected DIV, set corresponding pagination link's class name
	if (enabletransition){
		if (window[sliderid+2+"fadetimer"])
			clearTimeout(window[sliderid+2+"fadetimer"])
		this.setopacity(sliderid+2, 0.1)
	}
	slidernodes[sliderid+2][thepage+2].style.display="block" //show selected DIV
	if (enabletransition)
		this.fadeup(sliderid+2, thepage+2)
*/    
//////////////////////////        		
		
	//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)
	paginatelinks[paginatelinks.length-1].setAttribute("rel", thenextpage=(thepage<(paginatelinks.length-3))? thepage+1 : 0) // paginatelinks.length-3
	//Set "Back" pagination link's (link before current) "rel" attribute to the next DIV number to show
	paginatelinks[0].setAttribute("relb", thenextpage=(thepage>0)?(thepage-1) : paginatelinks.length-3) // paginatelinks.length-3
	
	// set the real back button to reflect changes
  var paginatelinksl=document.getElementById("paginate-"+sliderid+"l").getElementsByTagName("a") //gather back button pagination links
  paginatelinksl[0].setAttribute("relb", thenextpage=(thepage>0)?(thepage-1) : paginatelinks.length-3) // paginatelinks.length-3  	
	
  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, true) //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("relb", "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
		}
	}
}