This is not a SFW instance. NSFW communities will be tagged, and efforts will be made to keep SFW communities clean, but proceed at your own comfort level.
Even without JavaScript, back in my day doing some basic CSS stuff could effectively* do this too.
*Background showed if image doesn’t. Not hard to work around but did something if ad didn’t load.
There was better technique using CSS but I ran small band websites for basically free tickets so I wasn’t chasing riches. Just hosting cost. Single small ad was enough.
Even without JavaScript, back in my day doing some basic CSS stuff could effectively* do this too.
*Background showed if image doesn’t. Not hard to work around but did something if ad didn’t load.
There was better technique using CSS but I ran small band websites for basically free tickets so I wasn’t chasing riches. Just hosting cost. Single small ad was enough.
Tip for who wants to do it nowdays: use an SVG please…
Back in my day we did exact pixel measurements and compensated for IE6 breaking shit.