You can find the stopADVbanners.css file on my website. Just save this file on your hard drive then open the preferences panel of your favorite browser (Mozilla, Netscape, Apple Safari, Opera, etc) and choose this file as "preferred style sheet".
Some very easy CSS tricks I used:
/* disable ad image linking to advertising script */
A:link[HREF*="doubleclick"] IMG,
/* disable ad texts linking to advertising script */
A:link[HREF*="?banner"],
/* disable Flash banner ads */
embed[type*="shockwave"][width="468"][height="60"],
object[codebase*="shockwave"][width="468"][height="60"],
/* disable ad iframes */
IFRAME[SRC*="valueclick"],
/* disable ADV images as specified by www.iab.net */
*[width="468"][height="60"], *[width="468px"][height="60px"]
{ display: none !important; visibility: hidden !important; }[robg adds: Here's my obligatory webmaster comment ... if you block all ads all the time, those sites that rely on ad revenue may eventually start charging for access (see recent warnings on Macintouch, MacSurfer, etc.). I leave most ads enabled, only blocking pop-ups and highly annoying Flash ads, and occasionally buy stuff via click-throughs just to support my favorite sites ... one could argue the merits of the advertising-supported web model forever, though, and this hint does provide some good solutions to blocking highly annoying ads.]

