var today = new Date();
today.setFullYear(2010);
today.setMonth(2);
today.setDate(12);
today.setHours(8);
today.setMinutes(30);
today.setSeconds(58);
today.setMilliseconds(796);

function showBanner(fromYear, fromMonth, fromDate, fromHours, fromMinutes, fromSeconds,
                    toYear, toMonth, toDate, toHours, toMinutes, toSeconds) {
  var MONTH_OFFSET = 1;
  
  var launchDate = new Date();
  launchDate.setFullYear(fromYear);
  launchDate.setMonth(fromMonth-MONTH_OFFSET);
  launchDate.setDate(fromDate);
  launchDate.setHours(fromHours);
  launchDate.setMinutes(fromMinutes);
  launchDate.setSeconds(fromSeconds);
  launchDate.setMilliseconds(0);
  
  var expiryDate = new Date();
  expiryDate.setFullYear(toYear);
  expiryDate.setMonth(toMonth-MONTH_OFFSET);
  expiryDate.setDate(toDate);
  expiryDate.setHours(toHours);
  expiryDate.setMinutes(toMinutes);
  expiryDate.setSeconds(toSeconds);
  expiryDate.setMilliseconds(0);
  
  if (today.getTime() < launchDate.getTime() || today.getTime() > expiryDate.getTime())
    return false;
  else
    return true;
}