//browser identifizieren

var macos = (navigator.platform.indexOf('Mac')!=-1);

var dom = (document.getElementById) ? 1 : 0; 

var ie = (navigator.userAgent.indexOf('MSIE')!=-1);
var ie4x = (document.all && !document.getElementById ) ? 1 : 0;
var ie5x = (navigator.appVersion.indexOf('MSIE 5')!=-1);
var ie6x = (navigator.appVersion.indexOf('MSIE 6')!=-1);
var ie7x = (navigator.appVersion.indexOf('MSIE 7')!=-1);
var ie8x = (navigator.appVersion.indexOf('MSIE 8')!=-1);

var ns = (navigator.userAgent.indexOf('Netscape')!=-1);
var ns4x = (document.layers) ? 1 : 0; 
var ns70 = (navigator.userAgent.indexOf('Netscape/7.0')!=-1);

var other = (!dom && !ie4x && !ns4x ) ? 1 : 0; 
var opera = (navigator.userAgent.indexOf('Opera')!=-1);


//box um link entfernen

function nobox(){ 
	if (opera || other){return false;}
	if (ie4x){window.focus();} 
	if (dom){document.getElementById("fixbox").focus();} 
} 

//alte browser ausschliessen
function checkBrowser() {
	var browserFlag = 1;//ok

	if (ie && macos) {
		browserFlag = 0;
	}
	if (ie4x || ie5x || ie6x) {
		browserFlag = 0;
	}
	if (ns) {
		browserFlag = 0;
	}

	if (browserFlag == 0) {
		top.location.href='browser/browsertrouble.html';
	}
}



//startbild zufallsgenerieren

function rockIt() {
	var maxBGs = matrixBGs.length;
	
	//0 bis maxBGs-1
	var randomNumb = parseInt(maxBGs*Math.random());
	
	var matrixBGimg = startbilddir + (matrixBGs[randomNumb]['hintergrund']);
	var matrixLogo = startbilddir + (matrixBGs[randomNumb]['logo']);

	var out = '';
	out +='<style type="text/css">';
	out +='.start {';
	out +='background-image:url('+matrixBGimg+');';
	out +='}';
	out +='.logo-start {';
	out +='	background-image:url('+matrixLogo+');';
	out +='}';
	out +='</style>';
	document.write(out);
}

//scrollen
var newX = 0;
var scrollflag = 0;
var scrollspeed = 20;
var looper;

function matrix() {
	//mach nichts;
}


function scrollnow(richtung){
	window.scrollBy(scrollspeed*richtung,0);
	if (scrollflag == 1) {
		looper = window.setTimeout('scrollnow('+richtung+')',20);
	}
}

function stopscroll() {
	scrollflag = 0;
	window.clearTimeout('looper');
}

function doscroll(richtung) {
	scrollflag = 1;
	scrollnow(richtung);
}



//scrollwheel
//verschiedene browser = verschiedene event-arten

function hookEvent(element, eventName, callback) {
	if(typeof(element) == "string") {
		element = document.getElementById(element);
	}
	if(element == null) {
		return;
	}
	if(element.addEventListener) {
		if(eventName == 'mousewheel') {
			element.addEventListener('DOMMouseScroll', callback, false);
		}
		element.addEventListener(eventName, callback, false);
	} else if(element.attachEvent) {
		element.attachEvent("on" + eventName, callback);
	}
}

function unhookEvent(element, eventName, callback) {
	if(typeof(element) == "string") {
		element = document.getElementById(element);
	}
	if(element == null) {
		return;
	}
	if(element.removeEventListener) {
		if(eventName == 'mousewheel') {
			element.removeEventListener('DOMMouseScroll', callback, false);
		}
		element.removeEventListener(eventName, callback, false);
	} else if(element.detachEvent) {
		element.detachEvent("on" + eventName, callback);
	}
}


function cancelEvent(e, wheeldir) {
	e = e ? e : window.event;
	if(e.stopPropagation) {
		e.stopPropagation();
	}
	if(e.preventDefault) {
		e.preventDefault();
	}
	e.cancelBubble = true;
	e.cancel = true;
	e.returnValue = false;
	if (scrollflag ==1) {
		stopscroll();
	}
	return false;
}

function scrollwheel(e) {
	//if (scrollflag ==1) {
		e = e ? e : window.event;
		//scrollrichtung: detail = +; wheelData = -;
		var wheeldata = e.detail ? e.detail : (e.wheelDelta*-1);
		if (wheeldata > 0) {
			var wheeldir = -1;
		} else {
			var wheeldir = 1;
		}
		doscroll((wheeldir*-1));
	//}
	cancelEvent(e, wheeldir);
}




//bildwechsel

var currbildsrc = '';
var currbildname = '';
var currbilddir = '';
var currbildnummer = 0;
var nextbildnummer = 0;
var nextbildsrc = '';
var out = '';

//legenden
var legendentext = new Array();

function naechstesBild(bildID,maxbilder) {

	//nobox();

	//aktuellen bildpfad in array
	currbildsrc = document.images[bildID].src.split('/');
	//bildverzeichnis
	currbilddir = 'bilder/'+currbildsrc[currbildsrc.length-2];

	//bildname und zahl
	currbildname = currbildsrc[currbildsrc.length-1];
	currbildnummer =(currbildname.substring((currbildname.lastIndexOf('-')+1),currbildname.indexOf('.')));


	//string zu zahl
	currbildnummer = parseInt(currbildnummer, 10);//10 = dezimalsystem

	//zaehler + 1
	if (currbildnummer < maxbilder) {
		nextbildnummer = currbildnummer + 1;
	} else {
		nextbildnummer = 1;
	}

	//neues bild laden
	nextbildsrc = currbilddir + '/' + bildID + '-'+ nextbildnummer + '.jpg';
	//alert(nextbildsrc);
	document.images[bildID].src = nextbildsrc;

	//legende falls vorhanden
	if (legendentext[bildID] && legendentext[bildID][nextbildnummer]) {
		out = legendentext[bildID][nextbildnummer];
		document.getElementById('legende-'+bildID).innerHTML = out;
	}
}

//e-mail
function nachrichtAn(mailname,mailbude,mailkuerzel) {
	var adresse = 'mailto:'+mailname+'@'+mailbude+'.'+ mailkuerzel;
	top.location.href=adresse;
}