.topmain {
  float: left;
  display: block;
  text-align: left;
  width:100%;
}
.main {
  float: left; 
  display: block;
  width: 900px;
  text-align: left;
  background-color: #FFFFFF;
  margin: 0px;
  padding: 0px;
}

.left {
  float: left;
  display: block;
  width: 480px;
  margin: 0px;
  padding: 0px;
}
.left_in {
  padding: 20px;
  margin: 0px;
  overflow: hidden;
}

.right {
  float: right;
  display: block;
  width: 420px;
  margin: 0px;
  padding: 0px;
  overflow: hidden;
}
.right_in {
  padding: 20px 40px 20px 20px;
  margin: 0px;
  overflow: hidden;
}

.delimiter {
  float: left;
  display: block;
  border: 0px;
  margin: 0px;
  padding: 0px;
  overflow: hidden;
}

.delimiter_main {
  float: left;
  display: block;
  width: 900px;
  border: 0px;
  margin: 0px;
  padding: 0px;
  overflow: hidden;
}
.clear {
    clear: both; 
    visibility: hidden;
    height: 1px;
    overflow: hidden;
    margin-top: -1px;
    padding-top: -1px;
}