jQuery unable to run!

Hi all,

I added this code in my functions.php file.

// Load jQuery
	if ( !is_admin() ) {
	   wp_deregister_script('jquery');
	   wp_register_script('jquery', ("https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"), false);
	   wp_enqueue_script('jquery');
	}

	function kill_l10n() {
    if ( !is_admin() )
        wp_deregister_script( 'l10n' );
}
add_action( 'wp_print_scripts', 'kill_l10n' );

And I added this

<script src="=<?php bloginfo('template_url'); ?>/js/script.js"></script>

before

<?php wp_head(); ?>

Unfortunately, my jQuery script still can’t load.

Does anyone know how to troubleshoot this?

Thanks!