# File bin/dskexplorer.rb, line 124
def make_navigation_path(relative_path,filename=nil)
        path_parts=relative_path.split("/")
        #make the cookie-crumb-trail 
        partial_path=""
        s="<a href=/dir/>#{@@root_directory}</a>"
        path_parts.each do |p|
                if p.length>0 then
                        partial_path+="/#{p}"                        
                        if DSK.is_dsk_file?(partial_path) then                               
                                s<<"/<a href=/catalog#{uri_encode(partial_path)}>#{p}</a>"
                        else
                                s<<"/<a href=/dir#{uri_encode(partial_path)}>#{p}</a>"
                        end
                end
        end
        
        if !filename.nil? then
                s<<"/<a href=/showfile/#{uri_encode(relative_path)+'?filename='+uri_encode(filename)}>#{filename}</a>"
        end

        
        #show the contents of the current directory
        directories,dsk_files=get_directories_and_files(relative_path)

        #list out the directories
        
        s<<"<ul>"
        #s<<"<li>[dir] <a href=/#{uri_encode('/dir/'+File.dirname(relative_path))}>..</a>\n"
        directories.sort.each do |d|
                s<<"<li>[dir] <a href=/dir/#{uri_encode(relative_path)}/#{uri_encode(d)}>#{d}</a>\n"
        end
        
        #list out the DSK files                
        dsk_files.sort.each do |f|              
                s<<"<li>[dsk] <a href=/catalog/#{uri_encode(relative_path)}/#{uri_encode(f)}>#{f}</a> [ <a href=#{uri_encode(@@root_directory+relative_path+'/'+f)}>download</a> ]\n"
        end
        s<<"</ul>"

        s
end