/***************************************************/
// softscroll
// ben�tigt prototype.js und scriptaculous.js?load=effects
function softscroll(anker) {
	var parts = anker.split("#");
	new Effect.ScrollTo(parts[1]);
	return false;
}

/***************************************************/
// navigation
// navigationBuild sorgt f�r offene und geschlossene navigationsspalten beim seitenaufruf
function navigationBuild () {
	// aktuelleHauptrubrik ermitteln (m1 bis m6, b1 bis b6)
	myBodyID = document.body.getAttribute('id');
	var aktuelleHauptrubrik = myBodyID.substr(1,1);
	// alle navigationsspalten verstecken
	navigationHideAll ();
	// aktuelle navigationsspalte sichtbar machen
	navigationShow ("navigation_show"+aktuelleHauptrubrik);
}

// navigationHideAll blendet alle navigationsspalten aus
function navigationHideAll () {
	// alle navigationsspalten verstecken
	for (var i = 1; i <= 6; i++) {
		document.getElementById("navigation_show"+i).style.visibility = "hidden";
    }	
}

// navigationShow blendet einzelne navigationsspalten ein, parameter id
function navigationShow (id) {
	// entsprechende navigationsspalte sichtbar machen
    if(document.getElementById(id))	document.getElementById(id).style.visibility = "visible";
}

// navigationShowOne blendet einzelne navigationsspalte ein, alle anderen aus, parameter id
function navigationShowOne (id) {
	// alle navigationsspalten verstecken
	navigationHideAll ();
	// entsprechende navigationsspalte einblenden
	navigationShow (id);
}

/***************************************************/
// bugs
// IE6 flicker bug
function flickerBug() {
	ie = document.all;
	if(ie) {
		try {
			document.execCommand("BackgroundImageCache", false, true);
		} catch(err) {}
	}
}

/***************************************************/
// ladeBilder
// bildquellen m�ssen im array 'diebilder' stehen
function ladeBilder() {
	if (document.images) {
		bilderliste = new Array();
		for (zaehler in diebilder) {
			bilderliste[zaehler] = new Image();
			bilderliste[zaehler].src = diebilder[zaehler];
		}
	}
}


/***************************************************/
// idle.js © Alexios Chouchoulas 2009
// Released under the terms of the GNU Public License version 2.0 (or later).
// http://www.bedroomlan.org/coding/detecting-%E2%80%98idle%E2%80%99-and-%E2%80%98away%E2%80%99-timeouts-javascript
 
var _API_JQUERY = 1;
var _API_PROTOTYPE = 2;
var _api;
var _idleTimeout = 30000;	// 30 seconds
var _awayTimeout = 600000;	// 10 minutes
var _idleNow = false;
var _idleTimestamp = null;
var _idleTimer = null;
var _awayNow = false;
var _awayTimestamp = null;
var _awayTimer = null;
function setIdleTimeout(ms)
{
    _idleTimeout = ms;
    _idleTimestamp = new Date().getTime() + ms;
    if (_idleTimer != null) {
	clearTimeout (_idleTimer);
    }
    _idleTimer = setTimeout(_makeIdle, ms + 50);
    //console.log('idle in ' + ms + ', tid = ' + _idleTimer);
}
function setAwayTimeout(ms)
{
    _awayTimeout = ms;
    _awayTimestamp = new Date().getTime() + ms;
    if (_awayTimer != null) {
	clearTimeout (_awayTimer);
    }
    _awayTimer = setTimeout(_makeAway, ms + 50);
    //console.log('away in ' + ms);
}
function _makeIdle()
{
	var t = new Date().getTime();
    if (t < _idleTimestamp) {
	//console.log('Not idle yet. Idle in ' + (_idleTimestamp - t + 50));
	_idleTimer = setTimeout(_makeIdle, _idleTimestamp - t + 50);
	return;
    }
    //console.log('** IDLE **');
    _idleNow = true;
    try {
	if (document.onIdle) document.onIdle();
    } catch (err) {
    }
}
function _makeAway()
{
    var t = new Date().getTime();
    if (t < _awayTimestamp) {
	//console.log('Not away yet. Away in ' + (_awayTimestamp - t + 50));
	_awayTimer = setTimeout(_makeAway, _awayTimestamp - t + 50);
	return;
    }
    //console.log('** AWAY **');
    _awayNow = true;
    try {
	if (document.onAway) document.onAway();
    } catch (err) {
    }
}
function _initPrototype()
{
    _api = _API_PROTOTYPE;
}
function _active(event)
{
    var t = new Date().getTime();
    _idleTimestamp = t + _idleTimeout;
    _awayTimestamp = t + _awayTimeout;
    //console.log('not idle.');
    if (_idleNow) {
	setIdleTimeout(_idleTimeout);
    }
    if (_awayNow) {
	setAwayTimeout(_awayTimeout);
    }
    try {
	//console.log('** BACK **');
	if ((_idleNow || _awayNow) && document.onBack) document.onBack(_idleNow, _awayNow);
    } catch (err) {
    }
    _idleNow = false;
    _awayNow = false;
}
function _initPrototype()
{
    _api = _API_PROTOTYPE;
    var doc = $(document);
    Event.observe (window, 'load', function(event) {
	    Event.observe(window, 'click', _active);
	    Event.observe(window, 'mousemove', _active);
	    Event.observe(window, 'mouseenter', _active);
	    Event.observe(window, 'scroll', _active);
	    Event.observe(window, 'keydown', _active);
	    Event.observe(window, 'click', _active);
	    Event.observe(window, 'dblclick', _active);
	});
}
// Detect the API
try {
    if (Prototype) _initPrototype();
} catch (err) { }


/***************************************************/
// ssaver

setIdleTimeout(5000); // dauer bis screensaver
document.onIdle = function ssaver() {
	Effect.Appear($('ssaver'), { duration: 2 });
	document.body.onmousemove = function() {
		document.onmousemove = null;
		Effect.Fade($('ssaver'), { duration: 0.5 });
	}
}