File Sizes and Search Engine Optimization.
You should consider the size of your web site files--both for the benefit of
search engines and your visitors.
Obviously, you want your visitors to be able to get your web site to load fast,
but you need to help the search engines as well.
You can reduce file size in a few ways:
1.) Use External Style Sheets
2.) Use Validated Code
3.) Cut out all the junk
4.) Optimize your graphics
Most search engine spiders don't read javascript unless you include it from another page, so consider making all your menus real hyperlinks with anchor text. Your pages will load faster and the SE's will be happier.
Reducing the size of your pages will help with your overall search engine optimization.