#banner_principal{
  display: table;
  width: 978px;
  height: 295px;
  margin-top: 2px;
  background-color: #FFF;
  border-left: 1px solid #CCC;
  border-right: 1px solid #CCC;
}
#banner{
  display: table;
  width: 978px;
  height: 295px;
}
#banner img{
  width: 978px;
  height: 295px;
}