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



// 7 variables to control behavior
	var Car_Image_Width=113;
	var Car_Image_Height=200;
	var Car_Border=true;		// true or false
	var Car_Border_Color="white";
	var Car_Speed=4;
	var Car_Direction=true;		// true or false
	var Car_NoOfSides=8;		// must be 4, 6, 8 or 12

/* array to specify images and optional links. 
	For 4 sided carousel specify at least 2 images
	For 6 sided carousel specify at least 3
	For 8 sided carousel specify at least 4
	For 12 sided carousel specify at least 6
 If Link is not needed keep it ""
*/
	Car_Image_Sources=new Array(
		"./images/base/new-product1.jpg","products/jobe-valves.html#vortex-valve",
		"./images/base/new-product2.jpg","products/stallion-plastics.html#5-station-straight-feeder",
		"./images/base/new-product3.jpg","products/fil-products.html#iodoshield-active", //this slide isn't linked
		"./images/base/new-product4.jpg","products/fil-products.html#trough-block" // NOTE No comma after last line
		);


/***************** DO NOT EDIT BELOW **********************************/
	CW_I=new Array(Car_NoOfSides/2+1);C_ClcW=new Array(Car_NoOfSides/2);
	C_Coef=new Array(
		3*Math.PI/2,0,3*Math.PI/2,11*Math.PI/6,Math.PI/6,3*Math.PI/2,7*Math.PI/4,	0,
		Math.PI/4,3*Math.PI/2,5*Math.PI/3,11*Math.PI/6,0,Math.PI/6,Math.PI/3);
	var C_CoefOf=Car_NoOfSides==4?0:Car_NoOfSides==6?2:Car_NoOfSides==8?5:9;
	C_Pre_Img=new Array(Car_Image_Sources.length);
	var C_Angle=Car_Direction?Math.PI/(Car_NoOfSides/2):0,C_CrImg=Car_NoOfSides,C_MaxW,C_TotalW,
	C_Stppd=false,i,C_LeftOffset,C_HalfNo=Car_NoOfSides/2;

	function Carousel(){
		if(document.getElementById){
			for(i=0;i<Car_Image_Sources.length;i+=2){
				C_Pre_Img[i]=new Image();C_Pre_Img[i].src=Car_Image_Sources[i]}
			C_MaxW=Car_Image_Width/Math.sin(Math.PI/Car_NoOfSides)+C_HalfNo+1;
			Car_Div=document.getElementById("Carousel");
			for(i=0;i<C_HalfNo;i++){
				CW_I[i]=document.createElement("img");Car_Div.appendChild(CW_I[i]);	
				CW_I[i].style.position="absolute";
				CW_I[i].style.top=0+"px";
				CW_I[i].style.height=Car_Image_Height+"px";
				if(Car_Border){
					CW_I[i].style.borderStyle="solid";
					CW_I[i].style.borderWidth=1+"px";
					CW_I[i].style.borderColor=Car_Border_Color}
				CW_I[i].src=Car_Image_Sources[2*i];
				CW_I[i].lnk=Car_Image_Sources[2*i+1];
				CW_I[i].onclick=C_LdLnk;
				CW_I[i].onmouseover=C_Stp;
				CW_I[i].onmouseout=C_Rstrt}
			CarImages()}}

	function CarImages(){
		if(!C_Stppd){
			C_TotalW=0;
			for(i=0;i<C_HalfNo;i++){
				C_ClcW[i]=Math.round(Math.cos(Math.abs(C_Coef[C_CoefOf+i]+C_Angle))*Car_Image_Width);
				C_TotalW+=C_ClcW[i]}
			C_LeftOffset=(C_MaxW-C_TotalW)/2;
			for(i=0;i<C_HalfNo;i++){
				CW_I[i].style.left=C_LeftOffset+"px";
				CW_I[i].style.width=C_ClcW[i]+"px";
				C_LeftOffset+=C_ClcW[i]}
			C_Angle+=Car_Speed/720*Math.PI*(Car_Direction?-1:1);
			if((Car_Direction&&C_Angle<=0)||(!Car_Direction&&C_Angle>=Math.PI/C_HalfNo)){
				if(C_CrImg==Car_Image_Sources.length)C_CrImg=0;
				if(Car_Direction){
					CW_I[C_HalfNo]=CW_I[0];
					for(i=0;i<C_HalfNo;i++)CW_I[i]=CW_I[i+1];
					CW_I[C_HalfNo-1].src=Car_Image_Sources[C_CrImg];
					CW_I[C_HalfNo-1].lnk=Car_Image_Sources[C_CrImg+1]}
				else{	for(i=C_HalfNo;i>0;i--)CW_I[i]=CW_I[i-1];
					CW_I[0]=CW_I[C_HalfNo];
					CW_I[0].src=Car_Image_Sources[C_CrImg];
					CW_I[0].lnk=Car_Image_Sources[C_CrImg+1]}
				C_Angle=Car_Direction?Math.PI/C_HalfNo:0;C_CrImg+=2}}
		setTimeout("CarImages()",50)}

	function C_LdLnk(){if(this.lnk)window.location.href=this.lnk}
	function C_Stp(){this.style.cursor=this.lnk?"pointer":"default";C_Stppd=true;}
	function C_Rstrt(){C_Stppd=false}