If Bengali fonts are not displayed properly at this site, you may, at your own risk:
Download true-type font ItxBeng
Windows:
  • click start,
  • open settings,
  • open control panels
  • open fonts panel and
  • drag and drop the itxbeng.ttf file that you have downloaded
  • Unix machines:
  • Copy the itxbeng.ttf file into the directory ~/.fonts/ (ie, to the .fonts subdirectory of your home dir),
  • Run the font recaching utility program: fc-cache
  • Restart your web browser to pick up the new fonts.