html, body {
  height: 100%;
}

#wrap {
  min-height: 100%;
}

#main {
  overflow: auto; 
  padding-bottom: 150px; 
}

#footer {
  position: relative;
  margin-top: -150px;
  height: 150px;
  clear: both;
}

img {
  height: 120px;
  width: 120px;
}