Drupal 7 - Input Field and Javascript Events

Hi,

I wrote a module and this I call this hook:
	
	agenda0_form_id_form_alter(&$form, &$form_state, $form_id)

I need to set onClick event in an input field, but Drupal 7 add no
events in my input texfield.

$form['field_album_title'][$form['field_album_title']['#language']][0]['#attributes']['onchange']="Javascript: ag_change_txt(this.value,'agenda_title');";


Where is my fault?

Thanks for reply!

ADM

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