function sub_pop(url) {
    sub_dest = '';
    sub_dest = url;
    winname = 'i';
    props = 'width=' + screen.width - 75 + ',height=' + screen.height - 75;
    props = props + ',status=yes,toolbar=yes,resizable=yes,';
    props = props + 'titlebar=yes,scrollbars=yes,menubar=yes,location=yes';
    if (sub_dest != '') {
        var d = window.open(sub_dest, winname, props);
        d.blur();
    }
}