Form textfield on-click remove default values My objective is to automatically remove the default values within the form textfields upon either being selected/clicked on. Not really sure how to at the moment. Any suggestions?
What do you mean for "default value"? Do you need to save this value or just to use it as a placeholder?

In this case you can obtain the goal without javascript:

$form['Package']['FirstName'] = array(
  '#type' =&gt; 'textfield',
  '#maxlength'=&gt; 255,
  '#required' =&gt; TRUE,
  '#attributes' =&gt; array(
    'placeholder' =&gt; t('First Name'),
  ),   
);