Hide admin "Pages" menu item

Hi, does anyone knows how to hide the admin menu’s “Pages” section. I’ve been using:

add_action('admin_menu', 'my_plugin_menu');
function my_plugin_menu()
{
	echo '
		<style>
			#menu-pages {
				display: none;
			}
		</style>
	';
}

but this seems to mess the design in IE and I couldn’t find why

Thanks beforehand..