ul.gallery_list {
  margin: 0;
}
ul.gallery_list li {
  list-style-type: none;
  display: block;
  margin-left: .5em; 
  width: 80px;
  height: 80px;
  overflow: hidden;
  float: left;
  margin: 0 10px 10px 0; 
}
ul.gallery_list li img {
  opacity: 0.7;
  filter: alpha(opacity=70);
  -moz-opacity: 0.7;
  width: 80px;
  height: 80px;
}
ul.gallery_list li.active img {
  opacity: 1;
  filter: alpha(opacity=100);
  -moz-opacity: 1.0;
  border: 1px solid #ddd;
  width: 80px;
  height: 80px;
}

#big_image, #big_image img {
  height: 400px;
  width: 630px;
}
#big_image {
  margin:0 auto 60px auto;  
}
#big_image img{
  margin-bottom:10px;
}