* {
  margin: 0;
  padding: 0;   
}
body {
  text-align: center;
  font-family: arial,sans-serif;
  font-size: medium; 
  min-height: 500px;
}
#mainwrapper {
  margin: 2px auto;
  width: 790px; 
}
#mainwrapper select {
  width: 50px;
}
#mainwrapper #gimages {
  text-align: left;
}
#footer {
  margin-top: 60px;
}
#footer span a {
  font-size: 0;
  color: #fff;
}
#footer span a img {
  border: 0;
  font-size: 0;
}
#back {
  width: 100%;
  text-align: right;
}

small {
  color: gray;
  width: 430px;
  margin-left: auto;
  margin-right: auto;
}