I'm thrilled I managed to make use of the great image enlarger here
thank you ever so much for this snip of code.

I'm especially amazed, because it's working for animated gifs without me having to have two copies (which was what I did before as EW/FP did not thumbnail animated gifs.)

some of my main photos are huge, and I'd like the popups to be restricted to a percentage max of viewers screen size, keeping the aspect ratio.

I tried what I thought would work- I took this section
Code:
.ienlarger a:hover span { 
	display:block;
	top: 5px; /* means the pop-up's top is 50px away from thumb's top */
	left: 9px; /* means the pop-up's left is 90px far from the thumb's left */
	z-index: 100;
and made it
Code:
.ienlarger a:hover span { 
	display:block;
	top: 5px; /* means the pop-up's top is 50px away from thumb's top */
	left: 9px; /* means the pop-up's left is 90px far from the thumb's left */
	max-width:80%;
	max-height:80%;
	z-index: 100;

but failed.... can anyone tell me if what I want is readily achievable/what to add?