JavaScript控制阻止表单提交

<?php $form = ActiveForm::begin([
        ‘options‘=>[
            ‘class‘ => ‘form-horizontal‘,
            ‘enctype‘ => ‘multipart/form-data‘,
            ‘onSubmit‘=>‘return validateForm(event)‘,
        ],
        ‘fieldConfig‘ => [
            ‘template‘ => ‘{input}{error}‘,
            ‘options‘ => [‘class‘ => ‘form-field‘],
        ],
    ]); ?>

function validateForm(event){
        if($(‘.hidden_common_producer_grade_info_id[value=""]‘).length > 0){
            return false;
        }else{
            return true;
        }
    }