/* =Scroll top
-------------------------------------------------- */
function backToTop() {
	var x1 = x2 = x3 = 0;
	var y1 = y2 = y3 = 0;

	if (document.documentElement) {
		x1 = document.documentElement.scrollLeft || 0;
		y1 = document.documentElement.scrollTop || 0;
	}

	if (document.body) {
		x2 = document.body.scrollLeft || 0;
		y2 = document.body.scrollTop || 0;
	}

	x3 = window.scrollX || 0;
	y3 = window.scrollY || 0;

	var x = Math.max(x1, Math.max(x2, x3));
	var y = Math.max(y1, Math.max(y2, y3));

	window.scrollTo(Math.floor(x / 2), Math.floor(y / 2));

	if (x > 0 || y > 0) {
		window.setTimeout("backToTop()", 25);
	}
}

/* =Highlight field
-------------------------------------------------- */
function highlight(field) {
	field.focus();
	field.select();
}

/* =Select navigation
-------------------------------------------------- */
function go() {
	select = document.getElementById('nav');
	destination = select.options[select.selectedIndex].value;
	if (destination) location.href = destination;
}

/* =Toggle tabs
-------------------------------------------------- */
function toggleTab(id,tab){
	var element = document.getElementById(id);
	var tabelement = document.getElementById(tab);

	var tc1 = document.getElementById('tc1');
	var tc2 = document.getElementById('tc2');
	var tc3 = document.getElementById('tc3');
	var tc4 = document.getElementById('tc4');

	if (element.style.display == 'none') {

		tc1.style.display = 'none';
		tc2.style.display = 'none';
		tc3.style.display = 'none';
		tc4.style.display = 'none';

		var tabs = document.getElementById("tabs");
		var tabsli = tabs.getElementsByTagName("li");
		for (var i = 0; i < tabsli.length; i++) {
			tabsli[i].className = '';
		}

		element.style.display = 'block';
		tabelement.className = 'active';
	}
}

/* Toggle ID
-------------------------------------------------- */
function toggle(id){
	var imageid = id + "_toggle";
	var element = document.getElementById(id);

	if (element.style.display == 'none') {
		element.style.display = '';
		if (document.images[imageid]) {
			document.images[imageid].src = "gfx/toggle01.gif";
		}
	} else {
		element.style.display = 'none';
		if (document.images[imageid]) {
			document.images[imageid].src = "gfx/toggle02.gif";
		}
	}
}

/* Fade Anything
-------------------------------------------------- */
// @name      The Fade Anything Technique
// @namespace http://www.axentric.com/aside/fat/
// @version   1.0-RC1
// @author    Adam Michela

var Fat = {
	make_hex : function (r,g,b)
	{
		r = r.toString(16); if (r.length == 1) r = '0' + r;
		g = g.toString(16); if (g.length == 1) g = '0' + g;
		b = b.toString(16); if (b.length == 1) b = '0' + b;
		return "#" + r + g + b;
	},
	fade_all : function ()
	{
		var a = document.getElementsByTagName("*");
		for (var i = 0; i < a.length; i++)
		{
			var o = a[i];
			var r = /fade-?(\w{3,6})?/.exec(o.className);
			if (r)
			{
				if (!r[1]) r[1] = "";
				if (o.id) Fat.fade_element(o.id,null,null,"#"+r[1]);
			}
		}
	},
	fade_element : function (id, fps, duration, from, to)
	{
		if (!fps) fps = 30;
		if (!duration) duration = 750;
		if (!from || from=="#") from = "#f5f19a";
		if (!to) to = this.get_bgcolor(id);

		var frames = Math.round(fps * (duration / 1000));
		var interval = duration / frames;
		var delay = interval;
		var frame = 0;

		if (from.length < 7) from += from.substr(1,3);
		if (to.length < 7) to += to.substr(1,3);

		var rf = parseInt(from.substr(1,2),16);
		var gf = parseInt(from.substr(3,2),16);
		var bf = parseInt(from.substr(5,2),16);
		var rt = parseInt(to.substr(1,2),16);
		var gt = parseInt(to.substr(3,2),16);
		var bt = parseInt(to.substr(5,2),16);

		var r,g,b,h;
		while (frame < frames)
		{
			r = Math.floor(rf * ((frames-frame)/frames) + rt * (frame/frames));
			g = Math.floor(gf * ((frames-frame)/frames) + gt * (frame/frames));
			b = Math.floor(bf * ((frames-frame)/frames) + bt * (frame/frames));
			h = this.make_hex(r,g,b);

			setTimeout("Fat.set_bgcolor('"+id+"','"+h+"')", delay);

			frame++;
			delay = interval * frame;
		}
		setTimeout("Fat.set_bgcolor('"+id+"','"+to+"')", delay);
	},
	set_bgcolor : function (id, c)
	{
		var o = document.getElementById(id);
		o.style.backgroundColor = c;
	},
	get_bgcolor : function (id)
	{
		var o = document.getElementById(id);
		while(o)
		{
			var c;
			if (window.getComputedStyle) c = window.getComputedStyle(o,null).getPropertyValue("background-color");
			if (o.currentStyle) c = o.currentStyle.backgroundColor;
			if ((c != "" && c != "transparent") || o.tagName == "BODY") { break; }
			o = o.parentNode;
		}
		if (c == undefined || c == "" || c == "transparent") c = "#FFFFFF";
		var rgb = c.match(/rgb\s*\(\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*\)/);
		if (rgb) c = this.make_hex(parseInt(rgb[1]),parseInt(rgb[2]),parseInt(rgb[3]));
		return c;
	}
}

function startFat() {
	Fat.fade_all();
}

if (document.all && !window.opera) { //IE
	window.attachEvent('onload', startFat);
} else {
	window.addEventListener('load', startFat, false);
}

/* =jQuery
-------------------------------------------------- */
var toggleChangelog = {
	init : function(){
		$("#changelog h2").click(this.clickIt);
	},
	clickIt : function(){
		$(this).toggleClass("open");
		$(this).parent().children("dl").toggle("medium");
	}
};

$(document).ready(function(){
	toggleChangelog.init();
	$("#changelog dl").hide();
	$("#changelog dl").css("padding","0");
	$("#changelog dl dd:first").addClass('first');
	$("#changelog dl dd:last").addClass('last');
	$("#changelog h2").css('cursor','pointer');
});