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


//** Updated Oct 7th, 07 to version 2.0. Contains numerous improvements:


//   -Added Auto Mode: Script auto rotates the tabs based on an interval, until a tab is explicitly selected


//   -Ability to expand/contract arbitrary DIVs on the page as the tabbed content is expanded/ contracted


//   -Ability to dynamically select a tab either based on its position within its peers, or its ID attribute (give the target tab one 1st)


//   -Ability to set where the CSS classname "selected" get assigned- either to the target tab's link ("A"), or its parent container 





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





function ddtabcontent(tabinterfaceid){


	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.subcontentids=[] //Array to store ids of the sub contents ("rel" attr values)


	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")


}





ddtabcontent.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 ""


}





ddtabcontent.setCookie=function(name, value){


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


}





ddtabcontent.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


	},





	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


	},





	expandtab:function(tabref){


		var subcontentid=tabref.getAttribute("rel") //Get id of subcontent to expand


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


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


		this.expandsubcontent(subcontentid)


		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("rel")==subcontentid)? "selected" : ""


		}


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


			ddtabcontent.setCookie(this.tabinterfaceid, tabref.tabposition)


	},





	expandsubcontent:function(subcontentid){


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


			var subcontent=document.getElementById(this.subcontentids[i]) //cache current subcontent obj (in for loop)


			subcontent.style.display=(subcontent.id==subcontentid)? "block" : "none" //"show" or hide sub content based on matching id attr value


		}


	},








	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=ddtabcontent.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


		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.subcontentids[this.subcontentids.length]=this.tabs[i].getAttribute("rel") //store id of sub content ("rel" attr value)


				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