.banner_width {
  margin: 0 auto;
}

.fl {
  float: left;
}

.fr {
  float: right;
}

.clearfix {
  *zoom: 1;
}

.clearfix:before,
.clearfix:after {
  display: table;
  content: "";
  line-height: 0;
}

.clearfix:after {
  clear: both;
}