function popup(seite){

	var seite = "http://www.braintechnology.de/braintechnology/" + seite;
	var fenster_name = "shop";
	
	var fenster_breite = 730;
	var fenster_hoehe = 590;
	var groesse_aendern = 0;
	
	var menu_bar = 0;
	var scroll_bar = 1;
	var status_bar = 0;
	
	var hotkey_bar = 0;
	var directories_bar = 0;
	var copyhistory_bar = 0;
	
	var abstand_links = (screen.width - fenster_breite) / 2;
	var abstand_oben = (screen.height - fenster_hoehe) / 2;	
		
		newWindow = window.open(seite,fenster_name,"top="+abstand_oben+",directories="+directories_bar+",left="+abstand_links+",resizable="+groesse_aendern+",menubar="+menu_bar+",scrollbars="+scroll_bar+",width="+fenster_breite+",height="+fenster_hoehe+",status="+status_bar+",hotkeys"+hotkey_bar+",copyhistory="+copyhistory_bar+"");
		newWindow.focus();
}