The Java Plug-in HTML Converter 
  is a utility for converting an HTML page (file) containing applets to a format 
  for Java Plug-in. The conversion process is as 
  follows: 
    
  First, HTML that is not part of an applet is transferred 
  from the source file to a temporary file.  Then, when an <APPLET> 
  tag is reached, the converter parses the applet to the first </APPLET> 
  tag (not contained in quotes) and merges the applet data with the template. 
  (See Details about templates 
  in the section called More About HTML Converter 
  for more information.) If this completes without error, the original HTML file 
  is moved to the backup folder and the temporary file is then renamed as the 
  original file's name.  
The converter effectively converts the files in place. Thus, once the converter runs, files are setup for Java Plug-in.
For detailed information about installing and using the HTML Converter, see More About HTML Converter.