If you are planning to use the Javascript option with no download, just proceed on this page to enter your RSS feed URL (the address of the RSS feed you want to display) and you will then be able to create some Javascript to put on any web page.
Simply enter the feed URL provided by the site whose RSS feed you wish to display, and press the button. You can set quite a few parameters to customize your feed. If you do not know what any of these mean, just enter the feed URL. That's all you need. The rest is optional. For you experts out there, see the end of this page for a list of the parameters that you can play with yourself.