body {
  margin: 0;
  padding: 0;
  overflow: hidden;
}

div.sub {
  position: absolute;
  width: 20%;
  height: 100%;
  top: 0;
  left: 0;
  overflow: auto;
  background-color:"#FFFFFF";
  background-image : url(sakura.gif);
}

div.main {
  position: absolute;
  width: 80%;
  height: 100%;
  margin: 0 0 0 20%;
  overflow: auto;
  background-color:#FFFFFF";
  background-image : url(sakura.gif);
}

H4{
  line-height : 200%;
  letter-spacing : 1px;
  text-align : center;
   font-weight : 100;
}

H7{
 }