#main {
  background: #FFFFFF;
  position: absolute;
  top: 0px;
  width: 900px;
  left: 50%;
  margin-left: -450px;
  z-index: 1;
}

#header {
  position: relative;
  top: 0px;
  left: 0px;
  width: 900px;
  height: 88px;
  z-index: 2;
}

#menu {
  position: relative;
  background-image: url('images/bg_menu.jpg');
  background-repeat: no-repeat;
  background-position: top left;
  float: left;
  top: 0px;
  width: 165px;
  z-index: 2;
}

#content {
  position: relative;
  float: left;
  margin: 10px;
  width: 700px;
  padding-bottom: 30px;
  z-index: 2;
}

#image_box {
  position: relative;
  float: left;
  text-align: center;
  vertical-align: middle;
  top: 0px;
  left: 0px;
  width: 500px;
  height: 650px;
  z-index: 3;
}

#navigation_box {
  position: relative;
  float: left;
  text-align: center;
  top: 0px;
  left: 0px;
  width: 150px;
  height: 580px;
  z-index: 3;
  overflow:auto;
}