我对wp_enqueue_script的新方法

OK, i'm trying to eliminate all possible variables for troubleshooting purposes. So instead of in my functions.php, I've dropped this code in my header.php file:

<?php $mdgtemplateloc = get_bloginfo( 'template_url' ).'/js/'; ?>
<?php echo '<!-- ' . $mdgtemplateloc . ' --> ?>
<?php wp_enqueue_script( 'hoverIntent', $mdgtemplateloc.'hoverIntent.js', array( 'jquery' ) ); ?>
<?php wp_enqueue_script( 'mdMenuAnimation', $mdgtemplateloc.'mdMenuAnimation.js', array( 'hoverIntent' ) ); ?>

The result is a few white space insertions into the source and the comment appears as requested. My understanding was that this would insert something like

<script type="text/javascript" src="[url]/js/mdMenuAnimation.js"></script>

I want to do this the correct way, but wp_enqueue_script has been giving me NOTHING. I suspect I'm doing something fundamentally wrong, but I can't find it and nothing I find through google or stackoverflow or the wp codex is helping at all.

To clarify, here's what I had before, in the functions.php file:

function mdg_setup_scripts() {
  $mdgtemplateloc = get_bloginfo( 'template_url' ).'/js/';
  wp_register_script( 'hoverIntent', get_bloginfo('template_url').'/js/hoverIntent.js', array( 'jquery' ));
  wp_enqueue_script( 'hoverIntent' );
  wp_register_script( 'mdMenuAnimation', $mdgtemplateloc.'mdMenuAnimation.js', array( 'hoverIntent' ));
  wp_enqueue_script( 'mdMenuAnimation' );
}
add_action( 'wp_enqueue_scripts', 'mdg_setup_scripts' );

This also produced no output that ever called a script. I understand that this second is more like what is supposed to be, but it isn't doing anything.