Resized images are not anti-aliased

Question

I'm creating an app with html + js + css + air, and I'm doing
something like this:
<img src="
http://somedomain.com/image.jpg"
/>
I find that if I set the image height/width in css that when
the image loads it displays in very poor quality, mainly it looks
like it's not anti-aliased. The images look fine when I don't set a
height or width, so the images look fine by themselves, and when
rendered at their original size. It's only when I try to resize it
that it looks bad.
Any help is greatly appreciated - many thanks.

Answer 1

Thanks for the suggestion zorglub76. Perhaps I could find a
solution resizing the image in actionscript, but then I'm stuck
with another problem, which is how to take an image I've
manipulated in AS3 and render it in the html img tag? I'm
dynamically pulling images from amazon, so I can't resize them
ahead of time.
As far as the css goes, I don't believe that's the problem.
When I take the same html + css and render it in chrome, firefox,
or safari the smaller image looks great. It's only a problem in
adobe air, and I believe it has to do with it not being
anti-aliased.