/*
 * Fabtabulous! Simple tabs using Prototype
 * http://tetlaw.id.au/view/blog/fabtabulous-simple-tabs-using-prototype/
 * Andrew Tetlaw
 * version 1.1 2006-05-06
 * http://creativecommons.org/licenses/by-sa/2.5/
 */
var Fabtabs = Class.create({
	initialize : function(element) {
		this.el = $(element);
		this.options = Object.extend({}, arguments[1] || {});
		
		if ( !this.options.activetabclass ) {
			this.options.activetabclass = 'active-tab';
		}
		this.menu = $A(this.el.select('a'));
		this.show(this.getInitialTab());
		this.menu.each(this.setupTab.bind(this));
	},
	setupTab : function(elm) {
		Event.observe(elm,'click',this.activate.bindAsEventListener(this),false)
	},
	activate :  function(ev) {
		var elm = Event.findElement(ev, "a");
		if ( this.options.show_callback ) {
			eval( this.options.show_callback(elm) );
		}
		Event.stop(ev);
		this.show(elm);
	},
	hide : function(elm) {
		$(elm).removeClassName(this.options.activetabclass);
		$(this.tabID(elm)).removeClassName(this.options.activetabclass + '-body');
		if ( this.options.hide_callback ) {
			eval( this.options.hide_callback(elm) );
		}
	},
	show : function(elm) {
		$(elm).addClassName(this.options.activetabclass);
		$(this.tabID(elm)).addClassName(this.options.activetabclass + '-body');
		this.menu.without(elm).each(this.hide.bind(this));

	},
	tabID : function(elm) {
		return elm.href.match(/#(\w.+)/)[1];
	},
	getInitialTab : function() {
		if(document.location.href.match(/#(\w.+)/)) {
			var loc = RegExp.$1;
			var elm = this.menu.find(function(value) { return value.href.match(/#(\w.+)/)[1] == loc; });
			return elm || this.menu.first();
		} else {
			return this.menu.first();
		}
	}
});