Basic Example
Bootstrap includes validation styles for error, warning, and success states on form controls. To use, add .has-warning,
.has-error, or .has-success to the parent element. Any .control-label, .form-control, and .help-block within that element
will receive the validation styles.
This is a successfull help block
This is a warning help block
This is an error help block
Validation Stats with Icon
You can also add optional feedback icons with the addition of .has-feedback and the right icon.