CSS3 allows developers to implement a variety of visual and interactive functions most of us would previously have turned to JavaScript for. In this tutorial we will implement a drop-down menu, with background images featuring a gradient and rounded corners, all defined purely in CSS3 code. Our list will be structured using embedded lists in the HTML code, with top-level menu options appearing above their sub-menus, which we will display when users hover the mouse over the top level item. Here is...