body {
  background-color: black;
  color: white;
  margin: 0;
  padding: 0;
  font-family: Verdana, Arial, Helvetica, sans-serif;
  font-size: 12px;
}

div.main {
  margin: 0px auto 0px;
  width: 512px;
  background-image: url("img/fill_frame.png");
  background-repeat: repeat-y;
}

div.content {
  width: 400px;
  margin: 0px 0px 0px 90px;
}

div.head {
  margin: 100px auto 0px;
  width: 512px;
  height: 89px;
  background-image: url("img/top_frame.png");
}

div.foot {
  margin: 0px auto 0px;
  width: 512px;
  height: 87px;
  background-image: url("img/bottom_frame.png");
  text-align: center;
}

.error {
  font-weight: bold;
  color: red;
}