Compatibility with Node Style module

Here's a snippet of JavaScript for vertical_tabs.node_form.js to make Vertical Tabs compatible with the Node Style module (basic Drupal 6 port in #140044-9).

I set the priority to minor because the module hasn't been officially ported to D6, but I post it here in case someone finds it useful.

Drupal.verticalTabs.node_style = function() {
	var node_style = $('#edit-node-style-scheme option:selected').text();
	if (node_style) {
		return Drupal.t('@node_style', { '@node_style': node_style });
	}
	else {
	  return Drupal.t('None');
	}
}