你能从另一个文件中嵌入一段代码吗？

Here's specifically what I'm looking for. I have the same header and footer in every web page I have. By now I have something like 5-10 pages with the same info. If I need to make a change to not only the CSS styling (which is actually pretty easy with a style sheet) but I also want to change a few words displayed in the HTML file, I need to touch every single one, even though I know they will be identical. Is there a way I can have an embedded HTML file that contains just that block of code? In particular, I'm going to update my footer to by copyrighted 2016 instead of 2015 and I don't want to do it 10 times if I can help it. Any suggestions?Here's specifically what I'm looking for. I hav