a.signup-submit-button {
  text-indent: -9999px;
  display: block;
  background: transparent url(../images/mid/login-signup-submit-buttons-sprite.gif) -19px -171px no-repeat;
  width: 106px;
  height: 38px;
}

a.signup-submit-button:hover {
  background-position: -19px -247px;
  text-indent: -9999px;
}

a.login-submit-button {
  text-indent: -9999px;
  display: block;
  background: transparent url(../images/mid/login-signup-submit-buttons-sprite.gif) -19px -19px no-repeat;
  width: 106px;
  height: 38px;
}

a.login-submit-button:hover {
  background-position: -19px -95px;
  text-indent: -9999px;
}