How to Add a Field to the Drupal Contact form

<?php	
 
/**
 * Implementation of hook_form_alter().
 * @see http://api.drupal.org/api/function/hook_form_alter
 * We add a few custom fields to the default Drupal contact form
 */
function mtmcontact_form_contact_mail_page_alter(&$form, $form_state) {
 
	$form['company'] = array(
		'#title' => t('Your company'),
		'#type' => 'textfield',
		'#required' => true,
	);
	$form['phone'] = array(
		'#title' => t('Your phone'),
		'#type' => 'textfield',
	);
 
	// reorder the elements in the form to include the elements being inserted
	$order = array('contact_information', 'name', 'company', 'phone', 'mail', 'subject', 'message', 'copy', 'submit');
	foreach($order as $key => $field) {
		$form[$field]['#weight'] = $key;
	}
}