This is a slightly altered mirror of a script by Borislav Manolov, released under the GPL. The original script is here.

HTML2Wiki Converter

Number of dashes used for a row:   Use one-line position of cells in a row: yes no
Replace the existing signs “!|” with their HTML entities   Replace other HTML tags if possible
HTML markup:
Enter the HTML markup here
Wiki markup:
Here will be placed the wiki markup