var browser = navigator.appName;
var version = navigator.appVersion.substring(0,1);
var newwin;
version=Number(version);

function openWin(theURL,winname,features,maxBreite,maxHoehe,maxAufloesung) {

	if(screen.availWidth>maxAufloesung) {
		var breite = maxBreite;
		var hoehe = maxHoehe;
		var randLinks=(screen.availWidth-breite)/2;
		var randOben=((screen.availHeight-hoehe)/2)*0.5;
	}
	else {
		var breite=screen.availWidth-20;
		var hoehe=breite/1.727273;
		var randLinks=0;
		var randOben=0;
	}
	
	if(browser=="Netscape" && version>=4) {
		features += ',left='+randLinks+',top='+randOben+',width='+breite+',height='+hoehe;
		newwin = window.open(theURL,winname,features);
		if(screen.availWidth<maxAufloesung) {
			newwin.innerWidth=breite;
			newwin.innerHeight=hoehe;
		}
	}
	else {
		features += ',left='+randLinks+',top='+randOben+',width='+ breite +',height='+ hoehe;
		newwin = window.open(theURL,winname,features);
	}
	setTimeout('newwin.focus();',250);
}