Traditionally, graphic designers create a website’s template, and programmers build coding (HTML, CSS) to add pages, sub-pages, and features to it.

Make sure you validate your HTML and CSS, using a service like the W3C’s validator. This will warn you about obsolete tags and other errors that may make your HTML less robust.

Open your website's stylesheet in Notepad or your code editor. At the top of the code, write a style rule setting the entire page and HTML body to 100 percent height:html, body { height: 100%; } ...

Create a section for your CSS style sheet in the header of your HTML page. Link to an external CSS style sheet as an alternative for larger stylesheets. This code should also be placed in the ...