I need a code that makes it so that I can update all the navegation bars without going into every page and adding the new things to it! Please make life better by telling me the code!

http//:www.arcader.bravehost.com.html

Use a .js file to build the menu in JavaScript and reference the script file wherever you want to use it.

I use that technique on my site to maintain a common set of images on each page which I change from time to time.

A .js file can be a good way to solve the problem -- just remember to include an alternate method of navigation for use by your visitors who will have scripting disabled. Text links (in a fairly small font) along the bottom of the page are a common technique.