function bilgilendirme() {
    var popwidth = 300;
    var popheight = 250;
    var popleft = (window.screen.width - popwidth) / 2;
    var poptop = (window.screen.height - popheight) / 2;
    window.open('/tr/HaberKayit.aspx', '_blank', 'toolbar=no,status=yes,menubar=no,location=no,directories=no,resizable=no,scrollbars=no,width=' + popwidth + ',height=' + popheight + ',left=' + popleft + ',top=' + poptop);
}