function fixHour(h,mode) {
    if (mode != 24) { mode = 12; }
    h = h.replace(/[^0-9]/g,'');
    if (h > mode) {
        h = '';
    }
    if (mode == 12 && h == '0') {
        h = 12;
    }
    return h;
}

function fixMinute(m) {
    if (m.length == 1) {
        return m;
    }
    m = m.replace(/[^0-9]/g,'');
    if (m > 59) {
        m = '';
    }
    return m;
}

var viewerWindow = '';
function popUpViewer(url) {
    if (viewerWindow && viewerWindow.closed == false) { viewerWindow.close(); }
    viewerWindow = window.open(url,'','status=0,toolbar=0,location=0,menubar=0,directories=0,resizable=0,scrollbars=0,height=480,width=540');
}