WordPress confirm on publish

wp-publish-confirm.php

<?php
/*
Plugin Name: Confirm On Publish
Description: Prompts you to confirm if you want to publish or update a post
*/

add_action( 'load-post.php', 'x_confirm_before_publish' );

function x_confirm_before_publish() {
	?>
	<script>
	;(function($) {
		// Not quite perfect because it triggers the auto-save and the loady spinny doesn't go away after if you cancel
		jQuery(document).ready(function() {
			jQuery('#publish').click(function(e) {
				if(!confirm('Are you sure you want to publish this?')) return false;
			});
		});
	})(jQuery);
	</script>
	<?php
}

My version (just the JS) that I wrote a few months back, which also hides the throbber:

jQuery(document).ready(function($) {
    if ( $("input#publish").attr("value") == "Publish" ) {
        $("input#publish").click(function() {
            if (!confirm('Are you sure you want to publish this?')) {
                // Apparently just calling removeClass doesn't work, so as a hack, set a timeout of 0 so it happens a second later
                setTimeout("jQuery('input#publish').removeClass('button-primary-disabled')", 0);
                setTimeout("jQuery('input#save-post').removeClass('button-disabled')", 0);
                $("div#publishing-action img#ajax-loading").hide();
                return false;
            } else {
                $("div#publishing-action img#ajax-loading").show();
            }
        });
    }
});