/*
Copyright Justin Whitford 2006.
http://www.whitford.id.au/
Perpetual, non-exclusive license to use this code is granted
on the condition that this notice is left in tact.
*/

var delim = '|';
var trailLength = 4;
var chunks;
var DAY = 24 * 60 * 60 * 1000;

function doCrumbs(){
	if(cookieTest('xxx')){
		crumbList = new CrumbList();
		if(getCookie('trailLinks')){
			var staleLinkCrumbs = getCookie('trailLinks').split(delim);
			var staleTextCrumbs = getCookie('trailText').split(delim);
			var startPos=(staleTextCrumbs.length<trailLength || document.location==staleLinkCrumbs[staleLinkCrumbs.length-1])?0:1;
			for(i=startPos;i<staleLinkCrumbs.length;i++){
				crumbList.add(staleLinkCrumbs[i],staleTextCrumbs[i]);
  			}
		}
		if(document.location!=crumbList.links[crumbList.links.length-1]){
			crumbList.add(document.location,document.title);
		}
		setCookie('trailLinks',crumbList.links.join(delim),1);
		setCookie('trailText',crumbList.text.join(delim),1);
		crumbList.output();
	}
}


function CrumbList(){
	this.links=new Array();
	this.text=new Array();
	this.add = crumbListAdd;
	this.output = crumbListShow;
}

function crumbListAdd(href,text){
	this.links[this.links.length]=href;
  	this.text[this.text.length]=text;
  }
  
  function crumbListShow(){
	var	links_html = "",
		separator = "";
	for(var i in this.links){
		separator = (i==0) ? "" : " &gt; ";
		if(i==this.links.length-1){
			// document.write( ((i==0) ? "" : " | ") + this.text[i] );
			links_html = links_html + separator + this.text[i];
		} else {
			// document.write(((i==0)?"":" | ") +"<a href='" + this.links[i] + "'>" + this.text[i] + "</a>");
			links_html = links_html + separator +"<a href='" + this.links[i] + "'>" + this.text[i] + "</a>";
		}
  	}
	// alert("Addingjjjjj " + links_html + " to page.");
	document.write(links_html)
  }

function cookieTest(name){
  	try{
		setCookie(name,'true',1);
 		chunks = document.cookie.split("; ");
  		return (getCookie(name)=='true');
  	} catch(e) {
		return false;
  	}
}

function getCookie(name) {
	var returnVal = null;
	for (var i in chunks) {
		var chunk = chunks[i].split("=");
		returnVal = (chunk[0] == name)?unescape(chunk[1]):returnVal;
 	}
	return returnVal;
}

function setCookie(name, value, days) {
 	if (value != null && value != "" && days > 0){
 		var expiry= new Date(new Date().getTime() + days * DAY);
		var path = "/"
		// var cookie_str = name +"="+ escape(value) +"; expires="+ expiry.toGMTString() + "; path=" + path;
		var cookie_str = name +"=" + escape(value) + "; path=" + path;
		document.cookie = cookie_str;
		// alert("Setting cookie" + cookie_str);
		chunks = document.cookie.split("; ");
	}
}