Flat button styles for Twitter Bootstrap - conveniently borrowed from https://github.com/twitter/bootstrap/issues/1341

twitter-bootstrap-btn-flat

// For IE

.btn-inverse:active,
.btn-inverse.active {
  background-color: #080808 \9;
}

// Add 'btn-flat' to your buttons
.btn-flat {
    filter:progid:DXImageTransform.Microsoft.Gradient(enabled='false');
    -webkit-box-shadow: none;
    -moz-box-shadow: none;
    box-shadow: none;
    background-image:none;
    border:0;
}