Formcheck.js + joomla 2.5

JavaScript
1

hi!

I try to use formcheck.js in joomla. If the form is not valid, the error is not displayed. Need help.

<script type="text/javascript">

window.addEvent('domready', function() { formcheck = new FormCheck('adminForm') });

Joomla.submitbutton = function(task) {

if (task == 'property.cancel' || formcheck.isFormValid('adminForm') ) {
     	 <?php echo $this->form->getField('description')->save(); ?>
    	  Joomla.submitform(task);
    	}

}

</script>