img size problems

Hallo programers!
I have a problem with displaying images. I have an aplication where user can upload pictures, but very little place for displaying them. So, this is what I need:
Function that compare width and height of image and then, resize it like that: maximum width is 350px and maximum height is 110px . If picture is bigger, it is resized in the way that doesn't lose proportions if not, nothing happends.
Can anybody help me?
It should be java script, aplication is written in asp.

Do you need the code or logic?

maybe you should put this in the javascript forum

hey i moved this thread into where it will warrant more responses.

Javascript can't get the actual dimensions of the image, only the
dimensions you give the browser. Not only that, there is no way to
guarantee that the client has JavaScript enabled or even installed
on their machine; so I would suggest you do this on the server with
asp/php or whatever -> Get the dimensions, do some checking, and
create the html dynamically accordingly.

/My tuppence...

I was going to question the use of Javascript, but I see that Agent47 already has.
Definately has to be done server-side... perhaps on-upload...

Alternatively, have a fixed width and simply hardcode the IMG dimensions in the HTML.