HTML is the language most used to build web pages. It provides a lot of flexibility in building interactive and dynamic web pages. For example, you can use an image as a clicking button for a ...

Yet CSS supports properties that plain HTML does not, such as image opacity. For example, if you want a transparent photo of your company headquarters to appear on your website homepage, you can ...

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.