I need someone or ones to point me in the right direction so I can further my education.
Right now all of my web pages are in html created with Dreamweaver 4. I want to learn how to create code so I can quickly change an item that is common on all the pages. For instance, on many pages there is a small grouping of common links on the left side to the home page and the main topics of the site. I would like to get an idea of what I need to learn so I can change one file, and then change that link box on the entire site. That way it can be done quickly, or I can add or take out Adsense on the whole site very quicky if I wish.
I believe I need to learn about SSI to do this, or maybe SSI and CSS. Is that correct? Or would something else be better. Please point me in the right direction, and I'll look up stuff and learn it myself.
SSI stands for Server Side Include. It is what you are looking for.
CSS in turn can also help you accomplish this. But not for including pieces of code into another page. It just keeps all you design away from your markup. So if you wanted to change color, of font size on the whole site, you can do it easily by modifying one file.