/*------------------------------------
*  General Javascript functions for napacountybar.org
*  Version: October 08, 2007
*  Author:  webmeadow
*  Email:  aaron@webmeadow.com
*
*  Functions:
*	
*
*-------------------------------------*/

var enablepersist="off" //Enable saving state of content structure using session cookies? (on/off)
var collapseprevious="no" //Collapse previously open content when opening present? (yes/no)
	
var contractsymbol='' //HTML for contract symbol. For image, use: <img src="whatever.gif">
var expandsymbol='<img src="images/arrow.gif" alt="arrow" /> <span class="learn_link">Learn More</span>' //HTML for expand symbol.

if (document.getElementById){
	document.write('<style type="text/css">')
	document.write('.switchcontent{display:none;}')
	document.write('</style>')
}

function getElementbyClass(rootobj, classname){
	var temparray=new Array()
	var inc=0
	var rootlength=rootobj.length
	for (i=0; i<rootlength; i++){
		if (rootobj[i].className==classname)
		temparray[inc++]=rootobj[i]
	}
	return temparray
}

function sweeptoggle(ec){
	var thestate=(ec=="expand")? "block" : "none"
	var inc=0
	while (ccollect[inc]){
		ccollect[inc].style.display=thestate
		inc++
	}
	revivestatus()
}

function contractcontent(omit){
	var inc=0
	while (ccollect[inc]){
	if (ccollect[inc].id!=omit)
		ccollect[inc].style.display="none"
		inc++
	}
}


function expandcontent(curobj, cid){
	var spantags=curobj.getElementsByTagName("SPAN")
	var showstateobj=getElementbyClass(spantags, "showstate")
	if (ccollect.length>0){
		if (collapseprevious=="yes")
		contractcontent(cid)
		document.getElementById(cid).style.display=(document.getElementById(cid).style.display!="block")? "block" : "none"
		if (showstateobj.length>0){ //if "showstate" span exists in header
			if (collapseprevious=="no")
			showstateobj[0].innerHTML=(document.getElementById(cid).style.display=="block")? contractsymbol : expandsymbol
			else
			revivestatus()
		}
	}
}

function revivecontent(){
	contractcontent("omitnothing")
	selectedItem=getselectedItem()
	selectedComponents=selectedItem.split("|")
	for (i=0; i<selectedComponents.length-1; i++)
	document.getElementById(selectedComponents[i]).style.display="block"
}

function revivestatus(){
	var inc=0
	while (statecollect[inc]){
		if (ccollect[inc].style.display=="block")
		statecollect[inc].innerHTML=contractsymbol
		else
		statecollect[inc].innerHTML=expandsymbol
	inc++
	}
}

function get_cookie(Name) { 
	var search = Name + "="
	var returnvalue = "";
	if (document.cookie.length > 0) {
		offset = document.cookie.indexOf(search)
		if (offset != -1) { 
			offset += search.length
			end = document.cookie.indexOf(";", offset);
			if (end == -1) end = document.cookie.length;
			returnvalue=unescape(document.cookie.substring(offset, end))
		}
	}
	return returnvalue;
}

function getselectedItem(){
	if (get_cookie(window.location.pathname) != ""){
		selectedItem=get_cookie(window.location.pathname)
		return selectedItem
	}
	else
	return ""
}

function saveswitchstate(){
	var inc=0, selectedItem=""
	while (ccollect[inc]){
		if (ccollect[inc].style.display=="block")
		selectedItem+=ccollect[inc].id+"|"
		inc++
	}
	document.cookie=window.location.pathname+"="+selectedItem
}

function do_onload(){
	uniqueidn=window.location.pathname+"firsttimeload"
	var alltags=document.all? document.all : document.getElementsByTagName("*")
	ccollect=getElementbyClass(alltags, "switchcontent")
	statecollect=getElementbyClass(alltags, "showstate")
	if (enablepersist=="on" && ccollect.length>0){
		document.cookie=(get_cookie(uniqueidn)=="")? uniqueidn+"=1" : uniqueidn+"=0" 
		firsttimeload=(get_cookie(uniqueidn)==1)? 1 : 0 //check if this is 1st page load
		if (!firsttimeload)
		revivecontent()
	}
	if (ccollect.length>0 && statecollect.length>0)
	revivestatus()
}

if (window.addEventListener)
	window.addEventListener("load", do_onload, false)
else if (window.attachEvent)
	window.attachEvent("onload", do_onload)
else if (document.getElementById)
	window.onload=do_onload

if (enablepersist=="on" && document.getElementById)
	window.onunload=saveswitchstate
	
// Randomly rotate main banner image
function random_header_image(doc_path){
	var myimages=new Array()
	
	//specify random images below. You can have as many as you wish
	myimages[1]= doc_path + "images/banner_images/bird_tree.jpg"
	myimages[2]= doc_path + "images/banner_images/landscape_painting.jpg"
	myimages[3]= doc_path + "images/banner_images/courthouse_awning.jpg"
	myimages[4]= doc_path + "images/banner_images/hall_of_records_flowers.jpg"
	myimages[5]= doc_path + "images/banner_images/stained_glass.jpg"
	myimages[6]= doc_path + "images/banner_images/hall_front_door.jpg"

	var ry=Math.floor(Math.random()*myimages.length)

	if (ry==0)
		ry=1
		//document.getElementById('napa_banner').src == myimages[ry];
		document.write('<img src="'+myimages[ry]+'" alt="Napa County Image" />')
}