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%; } ...

Output: The results of executing the CSS, HTML, and JavaScript entered into the sections of the page. Figure A shows jsFiddle loaded in Internet Explorer 9 with empty code panes. Figure A ...

Click the scroll-down arrow in the middle column and select "Add CSS." Enter your custom CSS code in the "Add Custom CSS" box. Click the "Apply to Blog" button located in the right corner of the page.