public function init()
{
$this->setName('album');
$id = new Element\Hidden('id');
$id->addFilter('Int');
$artist = new Element\Text('artist');
$artist->setLabel('Artist')->setRequired(true)->addFilter('StripTags')->addFilter('StringTrim')->addValidator('NotEmpty');
$title = new Element\Text('title');
$title->setLabel('Title')->setRequired(true)->addFilter('StripTags')->addFilter('StringTrim')->addValidator('NotEmpty');
$submit = new Element\Submit('submit');
$submit->setAttrib('id', 'submitbutton');
$this->addElements(array($id, $artist, $title, $submit));
}