var todaysDate = new Date();

function cellRolloverOn(cell) {
  if (document.all) {
    var objCell = eval('document.all.' + cell + '.style'); 
    objCell.backgroundColor = "#99b2cc";
    if (todaysDate.getMonth() == 11 && todaysDate.getDate() >= 11 && todaysDate.getDate() <= 25) objCell.backgroundColor = "#ffffff";
  }
}
function cellRolloverOff(cell) {
  if (document.all) {
    var objCell = eval('document.all.' + cell + '.style');
    objCell.backgroundColor = "#336699";
    if (todaysDate.getMonth() == 11 && todaysDate.getDate() >= 11 && todaysDate.getDate() <= 25) objCell.backgroundColor = "#cc0033";
  }
}