feedback
<form role="form">
<div class="form-group has-success has-feedback">
<label class="control-label" for="inputSuccess1">成功状态</label>
<input type="text" class="form-control" id="inputSuccess1" placeholder="成功状态">
<span class="help-block">你输入的信息是正确的</span>
<span class="glyphicon glyphicon-ok form-control-feedback"></span>
</div>
<div class="form-group has-warning has-feedback">
<label class="control-label" for="inputWarning1">警告状态</label>
<input type="text" class="form-control" id="inputWarning1" placeholder="警告状态">
<span class="help-block">请输入正确信息</span>
<span class="glyphicon glyphicon-warning-sign form-control-feedback"></span>
</div>
<div class="form-group has-error has-feedback">
<label class="control-label" for="inputError1">错误状态</label>
<input type="text" class="form-control" id="inputError1" placeholder="错误状态">
<span class="help-block">你是输入的信息是错误的</span>
<span class="glyphicon glyphicon-remove form-control-feedback"></span>
</div>
</form>
效果图: