php - How to show form errorSummary() in red? -

i have form:

<?php     $form = $this->beginwidget('cactiveform', array(             'id' => 'login-form',             'enableclientvalidation' => true,             'clientoptions' => array(                 'validateonsubmit' => true,             ),         ));       $errormsg = $form->errorsummary($usermodel, "", "");      if(!empty($errormsg))     {         echo '<div class="alert alert-danger" style="text-align:center; width:800px; margin:auto;">' . $errormsg . '</div>';          echo '<br>';      }      $form->labelex($usermodel, 'email');     echo $form->textfield($usermodel, 'email');     $form->error($usermodel, 'email'); ?> 

i trying print error message when email invalid, want print using red background bootstrap. problem without errors still shows red bar.

it seems happens because errorsummary() never null

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output:

thats not how things work summary.

the errorsummary()-function returns content added page.
function makes sure returned div marked hidden if there no errors.

the reason done summary there front-end validation well. javascript update , hide/show div when needed.

so should this:

echo $form->errorsummary($usermodel, "", "", array('class' => "alert alert-danger")); 

and rid of if(!empty($errormsg)) ...