SEO with flash
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With Javascript you can detect the presence of the Flash Player on your user’s system and either display the Flash content or leave the existing (X)HTML on the page. This is also a huge advantage when it comes to search engine indexing since the alternate content is on the page and will be indexed as normal content. This also prevents novice users from seeing Internet Explorer’s ActiveX install box, which on Windows systems pre-SP2 is a very scary thing these days with all the Spyware and Malware running around on the internet. On most other browsers, you’ll likely see some empty box where the Flash content should be, sometimes with a broken image or puzzle piece icon which most novice users have no idea what to do with (Should they click on it? Is it part of the site?). If you include well written upgrade/install instructions in your alternate content, all of these problems are avoided.
No Extra configuration files for each Flash movie. Some alternate methods of embedding Flash content in XHTML documents include using extra configuration files or ‘holder’ movies that load in other movies. With this method there is no need for any extra files aside from the single .js file.
Alternate content is no longer written to the page by default - You may still use the fo.altText variable to add alternate content to your pages, but it is not recommended. The way to display alternate content in your pages with Flash content would be to place the alternate content on your page, and then specify the ID of the element with your content inside. The FlashObject script then writes your Flash content inside that element, replacing your alternate text/content so the end user with Flash will never see it, but users with no Javascript or without the required Flash version will see the alternate content. Google will also index your alternate content since it is just plain HTML.
Because of this change, you should always specify the ID of an element to write your Flash content into. You should also be sure to always include alternate content on the page. If your Flash movie is purely decorational, you can leave the div empty, similar to using empty alt attributes (alt="") on decorational images. Also note that with the new version you need to place your Javascript that writes the Flash content after the element that will contain your Flash content.
