I need to add a bit of document ready jQuery to post/page editors in admin. I'm hacking an old plugin that adds a text box to the editor page and handles inserting that text in a template file, but the text input is only html; this document ready function adds the class of mceEditor to the text box. This function works when I manually include it in admin-header.php, but I can't do that, of course.
I don't think I need to enqueue it, as it is not a library. Or do I? And, if applicable: what are the pros/cons of different ways to add it?
So how do I hook this or otherwise load it into the post/page editors in admin? It needs to go into the plugin file, not functions.php in the theme.