function commentsplit(tabinterfaceid){
	this.tabinterfaceid=tabinterfaceid 
	this.tabs=document.getElementById(tabinterfaceid).getElementsByTagName("a") 
	this.enabletabpersistence=true
	this.hottabspositions=[] 
	this.subcontentids=[] 
	this.revcontentids=[] 
	this.selectedClassTarget="link" 
}
commentsplit.getCookie=function(Name){ 
	var re=new RegExp(Name+"=[^;]+", "i"); 
	if (document.cookie.match(re)) 
		return document.cookie.match(re)[0].split("=")[1] 
	return ""
}
commentsplit.setCookie=function(name, value){
	document.cookie = name+"="+value+";path=/" 
}
commentsplit.prototype={
	expandit:function(tabid_or_position){ 
		this.cancelautorun() 
		var tabref=""
		try{
			if (typeof tabid_or_position=="string" && document.getElementById(tabid_or_position).getAttribute("rel")) 
				tabref=document.getElementById(tabid_or_position)
			else if (parseInt(tabid_or_position)!=NaN && this.tabs[tabid_or_position].getAttribute("rel")) 
				tabref=this.tabs[tabid_or_position]
		}
		catch(err){alert("Invalid Tab ID or position entered!")}
		if (tabref!="") 
			this.expandtab(tabref) },
	setpersist:function(bool){ this.enabletabpersistence=bool},
	setselectedClassTarget:function(objstr){ this.selectedClassTarget=objstr || "link"},
	getselectedClassTarget:function(tabref){ return (this.selectedClassTarget==("linkparent".toLowerCase()))? tabref.parentNode : tabref},

	expandtab:function(tabref){
		var subcontentid=tabref.getAttribute("rel") 
		
		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++){ 
			this.getselectedClassTarget(this.tabs[i]).className=(this.tabs[i].getAttribute("rel")==subcontentid)? "selected" : ""
		}
		if (this.enabletabpersistence) commentsplit.setCookie(this.tabinterfaceid, tabref.tabposition)},

	expandsubcontent:function(subcontentid){
		for (var i=0; i<this.subcontentids.length; i++){
			var subcontent=document.getElementById(this.subcontentids[i])
			subcontent.style.display=(subcontent.id==subcontentid)? "block" : "none" 
		}
	},


	expandrevcontent:function(associatedrevids){
		var allrevids=this.revcontentids
		for (var i=0; i<allrevids.length; i++){ 
			
			document.getElementById(allrevids[i]).style.display=(associatedrevids.indexOf(","+allrevids[i]+",")!=-1)? "block" : "none"
		}
	},

	autorun:function(){
		var currentTabIndex=this.automode_currentTabIndex
		var hottabspositions=this.hottabspositions 
		this.expandtab(this.tabs[hottabspositions[currentTabIndex]])
		this.automode_currentTabIndex=(currentTabIndex<hottabspositions.length-1)? currentTabIndex+1 : 0 
	},

	cancelautorun:function(){
		if (typeof this.autoruntimer!="undefined")
			clearInterval(this.autoruntimer)
	},

	init:function(automodeperiod){
		var persistedtab=commentsplit.getCookie(this.tabinterfaceid) 
		var persisterror=true 
		this.automodeperiod=automodeperiod || 0
		for (var i=0; i<this.tabs.length; i++){
			this.tabs[i].tabposition=i 
			if (this.tabs[i].getAttribute("rel")){
				var tabinstance=this
				this.hottabspositions[this.hottabspositions.length]=i 
				this.subcontentids[this.subcontentids.length]=this.tabs[i].getAttribute("rel") 
				this.tabs[i].onclick=function(){
					tabinstance.expandtab(this)
					tabinstance.cancelautorun() 
					return false
				}
				if (this.tabs[i].getAttribute("rev")){ 
					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]) 
					persisterror=false 
					
					this.automode_currentTabIndex=(i>0)? 0 : 1
				}
			}
		} 
		if (persisterror) 
			this.expandtab(this.tabs[this.hottabspositions[0]]) 
		if (parseInt(this.automodeperiod)>500 && this.hottabspositions.length>1){
			this.automode_currentTabIndex=this.automode_currentTabIndex || 0
			this.autoruntimer=setInterval(function(){tabinstance.autorun()}, this.automodeperiod)
		}
	} 

}