Desperately need DHTML nav. bar on site

I'm looking for a horizontal menu bar for my site.

The menu's already laid out and I tried coding it myself using something from a scripting site. The menu turned out great, but it stayed in place when I scrolled down the page. I can give that code to you if necessary. I'm trying to get my site complete as customers will be coming very soon.

Also, if there's an online site that would allow me to make it myself, that would be helpful too. I know how to program, this is just throwing me for a loop.

Thanks in advance for your help.