/*
Yetii - Yet (E)Another Tab Interface Implementation
http://www.kminek.pl/lab/yetii/
Copyright (c) 2007 Grzegorz Wojcik
Code licensed under the BSD License:
http://www.kminek.pl/bsdlicense.txt
*/

function Yetii() {

	this.defaults = {
		
		id: null,
		active: 0,
		timeout: null,
		interval: null,
		tabclass: 'tab',
		activeclass: 'active'
	
	};
	
	
	
	for (var n in arguments[0]) { this.defaults[n]=arguments[0][n]; };	
	
	
	
	this.getTabs = function() {
        
		
        var retnode = [];
        var elem = document.getElementById(this.defaults.id).getElementsByTagName('*');
		
		var regexp = new RegExp("(^|\\s)" + this.defaults.tabclass.replace(/\-/g, "\\-") + "(\\s|$)");
	
        for (var i = 0; i < elem.length; i++) {
        if (regexp.test(elem[i].className)) retnode.push(elem[i]);
        }
    
        return retnode;
    
    };
	
	this.links = document.getElementById(this.defaults.id + '-nav').getElementsByTagName('a');
	
	this.show = function(number){
        
		this.setCookie("yetti_active", number);
		
        for (var i = 0; i < this.tabs.length; i++) {
			this.tabs[i].style.display = ((i+1)==number) ? 'block' : 'none';
			this.links[i].className = ((i+1)==number) ? this.defaults.activeclass : '';
        }
    
    };
	
	this.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 null
	};

	this.setCookie = function(name, value){
		document.cookie = name+"="+value

	};
	
	 this.rotate = function(interval){
    
        this.show(this.defaults.active);
        this.defaults.active++;
		
        if(this.defaults.active > this.tabs.length) this.defaults.active = 1;
		
		this.setCookie("yetti_active", this.defaults.active);
	
        var self = this;
        this.defaults.timeout = setTimeout(function(){self.rotate(interval);}, interval*1000);
    
    };
	
	if (this.defaults.active == 0)
		this.defaults.active = this.getCookie("yetti_active");
	if (this.defaults.active == null) this.defaults.active = 1;
	if (this.defaults.active == 0) this.defaults.active = 1;
	
	this.tabs = this.getTabs();
	this.show(this.defaults.active);
	
	var self = this;
	for (var i = 0; i < this.links.length; i++) {
		this.links[i].customindex = i+1;
		this.links[i].onclick = function(){ if (self.defaults.timeout) clearTimeout(self.defaults.timeout); self.show(this.customindex); return false; };
    }
	
	if (this.defaults.interval) this.rotate(this.defaults.interval);
	
};