title: Google's drop shadows in HTML -- how does it work?
body: <p>Recently gmail added some <a href="http://gmailblog.blogspot.com/2009/02/new-ways-to-label-with-move-to-and-auto.html" rel="nofollow noreferrer">custom button and menu widgets</a> in html. They've already <a href="http://stopdesign.com/archive/2009/02/04/recreating-the-button.html" rel="nofollow noreferrer">tipped their hand</a> as to how the gradient effect within the button works without images.</p>
  
  <p>But there's also a subtle drop shadow behind the new menus, which doesn't appear to use images. There's also lots of crazy drop shadow effects in google maps.</p>
  
  <p>Does anyone have any inkling as to how this works?</p>