fb_button_example.html

<!DOCTYPE HTML>
<html>
  <head>
    <!-- in here whatever you want, like meta-tags etc -->

    <!-- following tag imports the english file needed for the button -->
    <!-- if you want to use it e.g. in German, simply replace en_US with de_DE -->
    <script src="http://connect.facebook.net/en_US/all.js#xfbml=1" type="text/javascript"></script>

    <!-- and some other stuff of yours -->
  </head>
  <body>
    <!-- also more stuff of yours -->

    <!-- you can customize width, layout, colorscheme, action and font -->
    <!-- layout = standard/button_count/box_count -->
    <!-- colorscheme = light/dark -->
    <!-- action = like/recommend -->
    <!-- font = arial/lucida grande/segoe ui/tahoma/trebuchet ms/verdana -->
    <fb:like href="YOUR WEBSITE'S URL" width="500" layout="button_count" colorscheme="light" action="like" font="arial"></fb:like>
    <!-- whatever you want -->
  </body>
</html>