PPT Slide
For example, consider the throbber widget in XUL: <button class=“plain” id=“navigator-throbber” … />
In this case, in the ‘Classic’ and ‘Modern’ skins, the plain class is used in numerous places to make a button without borders. The id ‘navigator-throbber’ is used to apply the throbber image: #navigator-throbber { list-style-image: url(“animthrob.gif”); }