function popup(loc) { HTML="WISO Fahrtenbuch Vorteilsrechner"; if(window.screen) var myleft=(screen.width-664)/2,mytop=(screen.height-1100)/2; popupImage=window.open('about:blank','_blank','toolbar=no,scrollbars=auto,width=625,height=960,left='+myleft+',top='+mytop); popupImage.document.open(); popupImage.document.write(HTML); popupImage.document.close(); }