.install_main {
  border: 0px solid #909090; 
  padding: 5px; 
  margin-top: 0px;  
  min-height: 300px;
  margin: auto;
}

.install_area {
  overflow:hidden; 
  position: relative;
  height: 200px; 
  width: 40%;
  float:left;
  border: 1px solid #c0c0c0; 
  padding: 10px; 
  margin: 10px;
  background: url('../images/box_background.png') repeat-x;
  background-color: #fcfcfc;
}