Inspired by Alex Brem's fieldSelection jQuery plugin, I began to make my own WBEditor(WebBlogEntry editor), see the following plot or a GIF demo (2.9MB):

Currently, five typies of buttons are available:
 1) Fonts: B(bold), U(underline), I(italic)
 2) Links: a(link)
 3) Multi-medias: wmv(movie), wma(audio), img(image)
 4) Find: string search in the textarea
 5) Undo, redo: (maximum 10 times)

Also added some validations from the server-side code(MyApp::Regex.pm)

Still in experimental stage (only contains some basic <c /> tags).