.MaskedEditFocus
  {
    background-color:#ffffcc;
  }
  .MaskedEditError
  {
    background-color:#ffcccc;
  }
  .MaskedEditFocusNegative
  {
    background-color: #ccccff;
  }
  .MaskedEditBlurNegative
  {
    background-color: #ff0000;
  }