Background


CSS

.facebook_button{
  float:left;
  display:block;
  line-height: 20px;
  padding-left: 25px;
  padding-right: 4px;
  background: url('/images/facebook_button.png') 0 0 no-repeat;
  border: 1px solid #1A356E;
  text-decoration: none;
  color: white;
}

Example