Wish you could click a button on your browser's toolbar to change the colour of a Web page, remove its annoying background, or stifle its music? At Steve Kangas's Bookmarklets site (www.bookmarklets.com), you'll find hundreds of free "bookmarklets" that add useful buttons to your browser for speeding up searches, customising navigation, and providing instant access to mail folders. Be sure to read the directions. Some bookmarklets work only with certain browsers, and some don't work with frames.