function modellauswahl(theURL) { //v2.0
 var left = (screen.width - 655) / 2;
 var top = (screen.height - 495) / 2;
 var winName = "Modellauswahl";
 var features = "STATUS=NO,TOOLBAR=NO,LOCATION=NO,DIRECTORIES=NO,COPYHISTORY=NO,MENUE=NO,RESIZABLE=NO,SCROLLBARS=NO,WIDTH=655,HEIGHT=365, " + "left=" + left + ", top=" + top;
  window.open(theURL,winName,features);
}