function popup(file, width, height) {
   plik = window.open(file, '_blank', 'toolbar=no,menubar=no,scrollbars=yes,resizable=yes,status=no,location=no,directories=no,fullscreen=no,width='+width+',height='+height);	
}

function popup_center(file, width, height,wname) {
   pozX=(screen.width/2)-(width/2);
   pozY=(screen.height/2)-(height/2);
   plik = window.open(file, wname, 'toolbar=no,menubar=no,scrollbars=no,resizable=no,status=no,location=no,directories=no,fullscreen=no,width='+width+',height=661,left=0,top=0,'+pozY);	
   plik.focus();
}