function popUp(MinURL, h, b) { leftPos = null, topPos = null; if (screen.width) { leftPos = Math.round((screen.width - b) / 2); topPos = Math.round((screen.height - h) / 2); } else { leftPos = 50 topPos = 50 } popupWin = window.open(MinURL, 'sommerhus', 'height=' + h + ',width=' + b + ',top=' + topPos + ',left=' + leftPos + ',innerHeight=0,innerWidth=0') popupWin.document.write('

'); popupWin.document.close(); }