Esoteric HTML - ismap vs CSS

The HTML specification is old and, while there is beauty in longevity, there's an inevitable build-up of boondoggles and baggage. Some elements like <marquee> have sadly been consigned to the dustbin of history - but there are still vestigial attributes just waiting to trip up the unwary. If you're young, you may never have heard of Image Maps. Back in the bad-old-days, there weren't many good options for laying out a pixel-perfect HTML page. One option was to draw your website in an image editor, load it into a website as an image, and then make certain areas of the image clickable. One way to do this was to add the attribute ismap. It is only valid on <img> elements which are inside an <a href=…> element. Like so: <a href="click.php"> <img ismap src="img.png" width="100" height="100"> </a> When you click on that image, you don't go to click.php - instead you go to click.php?12,34 where the two numbers represent the X and Y coordinates of where on the image you clicked. That's…