.advertisement_300x100
{
  position: relative;
  width: 302px;
  height: 102px;
  margin-bottom: 7px;
}

.advertisement_300x250
{
  position: relative;
  width: 302px;
  height: 252px;
  margin-bottom: 7px;
}

.advertisement_120x600_left
{
  position: relative;
  width: 122px;
  height: 602px;
  margin-left: 0px;
  margin-bottom: 7px;
  float: left;
}

.advertisement_120x600_right
{
  position: relative;
  width: 122px;
  height: 602px;
  margin-right: 0px;
  margin-bottom: 7px;
  float: right;
}