CMaskedTextField

protected function getClientOptions()
{
    $options=array();
    if($this->placeholder!==null)
        $options['placeholder']=$this->placeholder;

    if($this->completed!==null)
    {
        if($this->completed instanceof CJavaScriptExpression)
            $options['completed']=$this->completed;
        else
            $options['completed']=new CJavaScriptExpression($this->completed);
    }

    return $options;
}

public function registerClientScript()
{
    $id=$this->htmlOptions['id'];
    $miOptions=$this->getClientOptions();
    $options=$miOptions!==array() ? ','.CJavaScript::encode($miOptions) : '';
    $js='';
    if(is_array($this->charMap))
        $js.='jQuery.mask.definitions='.CJavaScript::encode($this->charMap).";\n";
    $js.="jQuery(\"#{$id}\").mask(\"{$this->mask}\"{$options});";

    $cs=Yii::app()->getClientScript();
    $cs->registerCoreScript('maskedinput');
    $cs->registerScript('Yii.CMaskedTextField#'.$id,$js);
}

public function run()
{
    if($this->mask=='')
        throw new CException(Yii::t('yii','Property CMaskedTextField.mask cannot be empty.'));

    list($name,$id)=$this->resolveNameID();
    if(isset($this->htmlOptions['id']))
        $id=$this->htmlOptions['id'];
    else
        $this->htmlOptions['id']=$id;
    if(isset($this->htmlOptions['name']))
        $name=$this->htmlOptions['name'];

    $this->registerClientScript();

    if($this->hasModel())
        echo CHtml::activeTextField($this->model,$this->attribute,$this->htmlOptions);
    else
        echo CHtml::textField($name,$this->value,$this->htmlOptions);
}