//** Ajax Tabs Content script v2.0- © Dynamic Drive DHTML code library (http://www.dynamicdrive.com)

//** Updated Oct 21st, 07 to version 2.0. Contains numerous improvements



var ddajaxtabssettings={};

ddajaxtabssettings.bustcachevar=1;  //bust potential caching of external pages after initial request? (1=yes, 0=no)

ddajaxtabssettings.loadstatustext="<img src='images/loading.gif' />&nbsp;&nbsp;&nbsp;Inhalt wird geladen..." ;





////NO NEED TO EDIT BELOW////////////////////////



function ddajaxtabs(tabinterfaceid, contentdivid){

	this.tabinterfaceid=tabinterfaceid; //ID of Tab Menu main container

	this.tabs=document.getElementById(tabinterfaceid).getElementsByTagName("a"); //Get all tab links within container

	this.enabletabpersistence=true;

	this.hottabspositions=[]; //Array to store position of tabs that have a "rel" attr defined, relative to all tab links, within container

	this.contentdivid=contentdivid;

	this.defaultHTML="";

	this.defaultIframe='<iframe src="about:blank" marginwidth="0" marginheight="0" frameborder="0" vspace="0" hspace="0" class="tabcontentiframe" allowtransparency="true" style="width:252px; height: 260px; background:#a4bedf; padding:20px 15px 0 15px;" scrolling="no"></iframe>';

	this.defaultIframe=this.defaultIframe.replace(/<iframe/i, '<iframe name="'+"_ddajaxtabsiframe-"+contentdivid+'" ');

this.revcontentids=[]; //Array to store ids of arbitrary contents to expand/contact as well ("rev" attr values)

	this.selectedClassTarget="link"; //keyword to indicate which target element to assign "selected" CSS class ("linkparent" or "link")

}



ddajaxtabs.connect=function(pageurl, tabinstance){

	var page_request = false;

	var bustcacheparameter="";

	if (window.XMLHttpRequest) // if Mozilla, IE7, Safari etc

		page_request = new XMLHttpRequest();

	else if (window.ActiveXObject){ // if IE6 or below

		try {

		page_request = new ActiveXObject("Msxml2.XMLHTTP");

		} 

		catch (e){

			try{

			page_request = new ActiveXObject("Microsoft.XMLHTTP");

			}

			catch (e){}

		}

	}

	else

		return false;

	var ajaxfriendlyurl=pageurl.replace(/^http:\/\/[^\/]+\//i, "http://"+window.location.hostname+"/") ;

	page_request.onreadystatechange=function(){ddajaxtabs.loadpage(page_request, pageurl, tabinstance)}

	if (ddajaxtabssettings.bustcachevar) //if bust caching of external page

		bustcacheparameter=(ajaxfriendlyurl.indexOf("?")!=-1)? "&"+new Date().getTime() : "?"+new Date().getTime();

	page_request.open('GET', ajaxfriendlyurl+bustcacheparameter, true);

	page_request.send(null);

}



ddajaxtabs.loadpage=function(page_request, pageurl, tabinstance){

	var divId=tabinstance.contentdivid;

	document.getElementById(divId).innerHTML=ddajaxtabssettings.loadstatustext; //Display "fetching page message"

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

		document.getElementById(divId).innerHTML=page_request.responseText;

		ddajaxtabs.ajaxpageloadaction(pageurl, tabinstance);

	}

}



ddajaxtabs.ajaxpageloadaction=function(pageurl, tabinstance){

	tabinstance.onajaxpageload(pageurl); //call user customized onajaxpageload() function when an ajax page is fetched/ loaded

}



ddajaxtabs.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 "";

}



ddajaxtabs.setCookie=function(name, value){

	document.cookie = name+"="+value+";path=/" ;//cookie value is domain wide (path=/)

}



ddajaxtabs.prototype={



	expandit:function(tabid_or_position){ //PUBLIC function to select a tab either by its ID or position(int) within its peers

		this.cancelautorun(); //stop auto cycling of tabs (if running)

		var tabref="";

		try{

			if (typeof tabid_or_position=="string" && document.getElementById(tabid_or_position).getAttribute("rel")) //if specified tab contains "rel" attr

				tabref=document.getElementById(tabid_or_position);

			else if (parseInt(tabid_or_position)!=NaN && this.tabs[tabid_or_position].getAttribute("rel")) //if specified tab contains "rel" attr

				tabref=this.tabs[tabid_or_position];

		}

		catch(err){alert("Invalid Tab ID or position entered!")}

		if (tabref!="") //if a valid tab is found based on function parameter

			this.expandtab(tabref) ;//expand this tab

	},



	setpersist:function(bool){ //PUBLIC function to toggle persistence feature

			this.enabletabpersistence=bool;

	},



	loadajaxpage:function(pageurl){ //PUBLIC function to fetch a page via Ajax and display it within the Tab Content instance's container

		ddajaxtabs.connect(pageurl, this);

	},



	loadiframepage:function(pageurl){ //PUBLIC function to fetch a page and load it into the IFRAME of the Tab Content instance's container

		this.iframedisplay(pageurl, this.contentdivid);

	},



	setselectedClassTarget:function(objstr){ //PUBLIC function to set which target element to assign "selected" CSS class ("linkparent" or "link")

		this.selectedClassTarget=objstr || "link";

	},



	getselectedClassTarget:function(tabref){ //Returns target element to assign "selected" CSS class to

		return (this.selectedClassTarget==("linkparent".toLowerCase()))? tabref.parentNode : tabref;

	},



	onajaxpageload:function(pageurl){ //PUBLIC Event handler that can invoke custom code whenever an Ajax page has been fetched and displayed

		//do nothing by default

	},



	expandtab:function(tabref){

		var relattrvalue=tabref.getAttribute("rel");

		//Get "rev" attr as a string of IDs in the format ",john,george,trey,etc," to easy searching through

		var associatedrevids=(tabref.getAttribute("rev"))? ","+tabref.getAttribute("rev").replace(/\s+/, "")+"," : "";

		if (relattrvalue=="#default")

			document.getElementById(this.contentdivid).innerHTML=this.defaultHTML;

		else if (relattrvalue=="#iframe")

			this.iframedisplay(tabref.getAttribute("href"), this.contentdivid);

		else

			ddajaxtabs.connect(tabref.getAttribute("href"), this);

		this.expandrevcontent(associatedrevids);

		for (var i=0; i<this.tabs.length; i++){ //Loop through all tabs, and assign only the selected tab the CSS class "selected"

			//this.getselectedClassTarget(this.tabs[i]).className=(this.tabs[i].getAttribute("href")==tabref.getAttribute("href"))? "selected" : "";

			var hrefclass = "box" + (i+1);

			this.getselectedClassTarget(this.tabs[i]).className=(this.tabs[i].getAttribute("href")==tabref.getAttribute("href"))? hrefclass + "Selected" : hrefclass;

		}

		if (this.enabletabpersistence) //if persistence enabled, save selected tab position(int) relative to its peers

			ddajaxtabs.setCookie(this.tabinterfaceid, tabref.tabposition);

	},



	iframedisplay:function(pageurl, contentdivid){

		if (typeof window.frames["_ddajaxtabsiframe-"+contentdivid]!="undefined"){

			try{delete window.frames["_ddajaxtabsiframe-"+contentdivid];} //delete iframe within Tab content container if it exists (due to bug in Firefox)

			catch(err){}

		}

		document.getElementById(contentdivid).innerHTML=this.defaultIframe;

		window.frames["_ddajaxtabsiframe-"+contentdivid].location.replace(pageurl); //load desired page into iframe

	},





	expandrevcontent:function(associatedrevids){

		var allrevids=this.revcontentids;

		for (var i=0; i<allrevids.length; i++){ //Loop through rev attributes for all tabs in this tab interface

			//if any values stored within associatedrevids matches one within allrevids, expand that DIV, otherwise, contract it

			document.getElementById(allrevids[i]).style.display=(associatedrevids.indexOf(","+allrevids[i]+",")!=-1)? "block" : "none";

		}

	},



	autorun:function(){ //function to auto cycle through and select tabs based on a set interval

		var currentTabIndex=this.automode_currentTabIndex; //index within this.hottabspositions to begin

		var hottabspositions=this.hottabspositions; //Array containing position numbers of "hot" tabs (those with a "rel" attr)

		this.expandtab(this.tabs[hottabspositions[currentTabIndex]]);

		this.automode_currentTabIndex=(currentTabIndex<hottabspositions.length-1)? currentTabIndex+1 : 0; //increment currentTabIndex

	},



	cancelautorun:function(){

		if (typeof this.autoruntimer!="undefined")

			clearInterval(this.autoruntimer);

	},



	init:function(automodeperiod){

		var persistedtab=ddajaxtabs.getCookie(this.tabinterfaceid); //get position of persisted tab (applicable if persistence is enabled)

		var persisterror=true; //Bool variable to check whether persisted tab position is valid (can become invalid if user has modified tab structure)

		this.automodeperiod=automodeperiod || 0;

		this.defaultHTML=document.getElementById(this.contentdivid).innerHTML;

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

			this.tabs[i].tabposition=i; //remember position of tab relative to its peers

			if (this.tabs[i].getAttribute("rel")){

				var tabinstance=this;

				this.hottabspositions[this.hottabspositions.length]=i; //store position of "hot" tab ("rel" attr defined) relative to its peers

				this.tabs[i].onclick=function(){

					tabinstance.expandtab(this);

					tabinstance.cancelautorun(); //stop auto cycling of tabs (if running)

					return false;

				}

				if (this.tabs[i].getAttribute("rev")){ //if "rev" attr defined, store each value within "rev" as an array element

					this.revcontentids=this.revcontentids.concat(this.tabs[i].getAttribute("rev").split(/\s*,\s*/));

				}

				if (this.enabletabpersistence && parseInt(persistedtab)==i || !this.enabletabpersistence && this.getselectedClassTarget(this.tabs[i]).className=="selected"){

					this.expandtab(this.tabs[i]); //expand current tab if it's the persisted tab, or if persist=off, carries the "selected" CSS class

					persisterror=false; //Persisted tab (if applicable) was found, so set "persisterror" to false

					//If currently selected tab's index(i) is greater than 0, this means its not the 1st tab, so set the tab to begin in automode to 1st tab:

					this.automode_currentTabIndex=(i>0)? 0 : 1;

				}

			}

		} //END for loop

		if (persisterror) //if an error has occured while trying to retrieve persisted tab (based on its position within its peers)

			this.expandtab(this.tabs[this.hottabspositions[0]]); //Just select first tab that contains a "rel" attr

		if (parseInt(this.automodeperiod)>500 && this.hottabspositions.length>1){

			this.automode_currentTabIndex=this.automode_currentTabIndex || 0;

			this.autoruntimer=setInterval(function(){tabinstance.autorun()}, this.automodeperiod);

		}

	} //END int() function



} //END Prototype assignment