function ShowPopup(URL,breite,hoehe,scrbar,fname) {
		var fullscreen = "no";
		if(breite == 0 && hoehe == 0) fullscreen="yes";
		if(breite == 0) { breite = screen.width; }
		if(hoehe == 0) { hoehe = screen.height; }
		if(fname == '') { fname = "Popup"; }
		var scrollbar = "yes";
		if(scrbar == '0') { scrollbar = "no"; }
		var winLeft = (screen.width - breite) / 2;
		var winTop = (screen.height - hoehe) / 2;
		fenster = window.open(URL,fname,'left='+winLeft+',top='+winTop+',scrollbars='+scrollbar+',resizeable=no,toolbar=no,status=no,menubar=no,width='+breite+',height='+hoehe+',fullscreen='+fullscreen);
		//fenster.resizeTo(breite,hoehe);
	    //fenster.moveTo(winLeft,winTop);
		if (parseInt(navigator.appVersion) >= 4) { fenster.window.focus(); }
}