Bookmarklet to check content of current page

Hello there,

I made a small bookmarklet, that let's you check the page you are on
right now.
The difference to the currently available bookmarklet is, that it uses
the current page source, instead of a link to the current page.
Because of this, it works on login-protected pages and pages that were
modified by javascript.

I would recommend to add it to http://validator.w3.org/favelets.html