Remove contextual help

hey all:

in wordpress 2.7, i have noticed there is a ‘contextual help’ item hovering at the top of all admin pages (pages with wp-admin in their url).

i have given all my users only the ability to edit their profile (have removed the sidebar menu etc.), and i wish to also remove this item from their profile.

i have traced down the contextual help to be in /wp-admin/js/common.js, however since this is a javascript file, i cannot use the following function:

<?php if (current_user_can('edit_users')){ ?>
TRALALALA
<?php }?>

can anyone tell me how i can remove this only for subscribers / users without admin permissions?

thanks.