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.
<!DOCTYPE HTML>
<html>
<head>
<link href="http://java2s.com/style/bootstrap.min.css" rel="stylesheet">
</head><!-- w w w . j a v a 2 s. co m-->
<body style='margin: 20px;'>
<form class="form-inline">
<div class="form-group has-warning">
<label class="control-label" for="inputWarning">Input with
warning</label> <input type="text" class="form-control" id="inputWarning">
</div>
<div class="form-group has-error">
<label class="control-label" for="inputError">Input with
error</label> <input type="text" class="form-control" id="inputError">
</div>
<div class="form-group has-success">
<label class="control-label" for="inputSuccess">Input with
success</label> <input type="text" class="form-control" id="inputSuccess">
</div>
</form>
</body>
</html>