// JavaScript Document







//** 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



//** Updated Feb 18th, 08 to version 2.1: Adds a "tabinstance.cycleit(dir)" method to cycle forward or backward between tabs dynamically



//** Updated April 8th, 08 to version 2.2: Adds support for expanding a tab using a URL parameter (ie: http://mysite.com/tabcontent.htm?tabinterfaceid=0) 







////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.currentTabIndex=0 //Index of currently selected hot tab (tab with sub content) within hottabspositions[] array



	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



	},







	cycleit:function(dir, autorun){ //PUBLIC function to move foward or backwards through each hot tab (tabinstance.cycleit('foward/back') )



		if (dir=="next"){



			var currentTabIndex=(this.currentTabIndex<this.hottabspositions.length-1)? this.currentTabIndex+1 : 0



		}



		else if (dir=="prev"){



			var currentTabIndex=(this.currentTabIndex>0)? this.currentTabIndex-1 : this.hottabspositions.length-1



		}



		if (typeof autorun=="undefined") //if cycleit() is being called by user, versus autorun() function



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



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



	},







	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



	},







	urlparamselect:function(tabinterfaceid){



		var result=window.location.search.match(new RegExp(tabinterfaceid+"=(\\d+)", "i")) //check for "?tabinterfaceid=2" in URL



		return (result==null)? null : parseInt(RegExp.$1) //returns null or index, where index (int) is the selected tab's index



	},







	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)



		this.setcurrenttabindex(tabref.tabposition) //remember position of selected tab within hottabspositions[] array



	},







	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"



		}



	},







	setcurrenttabindex:function(tabposition){ //store current position of tab (within hottabspositions[] array)



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



			if (tabposition==this.hottabspositions[i]){



				this.currentTabIndex=i



				break



			}



		}



	},







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



		this.cycleit('next', true)



	},







	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 selectedtab=-1 //Currently selected tab index (-1 meaning none)



		var selectedtabfromurl=this.urlparamselect(this.tabinterfaceid) //returns null or index from: tabcontent.htm?tabinterfaceid=index



		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 (selectedtabfromurl==i || this.enabletabpersistence && selectedtab==-1 && parseInt(persistedtab)==i || !this.enabletabpersistence && selectedtab==-1 && this.getselectedClassTarget(this.tabs[i]).className=="selected"){



					selectedtab=i //Selected tab index, if found



				}



			}



		} //END for loop



		if (selectedtab!=-1) //if a valid default selected tab index is found



			this.expandtab(this.tabs[selectedtab]) //expand selected tab (either from URL parameter, persistent feature, or class="selected" class)



		else //if no valid default selected index found



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



		}



	} //END int() function







} //END Prototype assignment