function hiImg(img) { }
function loImg(img) { }
var _safe = false;

function BrowserCan() {
	if (parseInt(navigator.appVersion) >= 4) {
		if (!document.layers)	return true;
	}
}

function max(a,b) {
	return (a >= b) ? a : b;
}

function basefilename(s) {
	return s.substring(s.lastIndexOf("/")+1,(s.length - (s.length - s.lastIndexOf("."))));
}

function baseurl(s) {
	return s.substring(0, max(s.indexOf(":"), s.lastIndexOf("/"))+1);
}

function extn(s) {
	var x = s.lastIndexOf(".");
	if (x <= 0) x = s.length;
	return s.substring(x, s.length);
}

function makeImg(base,filename,ext,add,name,w,h) {
	eval(name+"_"+add+" = new Image("+w+", "+h+")");
	eval(name+"_"+add+".src = \""+base+filename+ext+"\"");
}

function makeBtn(img) {
	var base = baseurl(img.src);
	var filename = basefilename(img.src);
	var name = img.name;
	var ext = extn(img.src);

	makeImg(base,filename,ext,'lo',name,img.width,img.height);
	var hiFilename = filename.replace(/_lo$/,"_hi");
	makeImg(base,hiFilename,ext,'hi',name,img.width,img.height);
}

function BuildImgs() {
	if (BrowserCan()) {
		for (var i = 0; i < document.images.length; i++) {
			if (document.images[i].src.indexOf("_lo.") >= 0) makeBtn(document.images[i]);
		}
		_safe = true;
	}
}

if (BrowserCan()) {
	eval("function hiImg(img,dd) { if (_safe) {if(dd) {document.images[img].src = dd;}else{ document.images[img].src = eval(img + \"_hi.src\"); }} }");
	eval("function loImg(img,dd) { if (_safe) { if(dd) {document.images[img].src = dd;}else{document.images[img].src = eval(img + \"_lo.src\"); }} }");
} else { }

var Netscape, MSIE, Opera, Unknown;
var Win, Mac, Other;
var NetscapeVer, MSIEVer, OperaVer;

Netscape = navigator.appName == "Netscape";
MSIE = navigator.appName == "Microsoft Internet Explorer";
Opera = navigator.userAgent.indexOf("Opera") > -1;
Unknown = !(Netscape || MSIE || Opera);

Win = navigator.userAgent.indexOf("Win") > -1;
Mac = navigator.userAgent.indexOf("Mac") > -1;
Other = !(Win || Mac);

if(Netscape) NetscapeVer = parseFloat(navigator.appVersion);
else if(MSIE) {
	n = navigator.userAgent;
	MSIEVer = n.substr(n.indexOf("MSIE ")+("MSIE ").length, 4);
	MSIEVer = parseFloat(MSIEVer);
	if(Opera) {
		OperaVer = n.substr(n.indexOf("Opera ")+("Opera ").length, 4);
		OperaVer = parseFloat(OperaVer);
	}
}


function neuesFenster(meineSeite,meinName,w,h,scroll){
LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;
TopPosition = (screen.height) ? (screen.height-h)/2 : 0;
settings =
'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',no-resize'
Fenster = window.open(meineSeite,meinName,settings)
}