I have this jfiddle working (http://jsfiddle.net/FJxcG/), but the same code does not work on my Drupal 7 website. I added the JS file to my theme .info file, and the JS is showing up in the source; it's just not displaying the end result on-screen.
The reason I need this is so that I can wrap a span class around all instances of the Trademark special character (™). That character is too large in the font I am using, and I'd like to use that css/jquery function to apply the span so I can give the TM a smaller font size without affecting the rest of the text around it. Some of the TM's are within menu links, so I can't simply hard-code the new span class.