I'm building a new site with a sidebar on the right. The page layout is the same for all six pages. In the sidebar I want to have latest news and events; dynamic content basically. I'd like to have that content in a separate file so that I only have to edit it in one place and then have it show up on each of the six pages.I'm relearning HTML and learning css and javascript now, but I can't seem to find a good way to do this.