keep aspect ration of images in html tables

Hello all,
I have the following problem:
I want to create a table with three rows and two columns in html which
contains in each cell three additional rows. In the first additional
row I want to display an image in the second and third row some text.
Now the question:
The image I want to display should keep the correct aspect ration but
should also use the whole available space in the cell. So this means
that the image may be resized in width or height (or both if width and
height are identical). How can I manage this without using absolute
height and width for the table cells?
I know that I can leave out the width (or height) parameter for the
image and that the IE scale the missing paramter automatically to the
correct value to keep the aspect ratio. But then I have to know, which
parameter can be left out (width or height).
I must also say, that I did not know the width and height of the image
at the time I want to display it. If so, I can calculate the correct
width and height by Javascript.
Is there a solution for this problem (e.g. a html parameter
"keepaspectration" or something like this?) Or is it easily possible
to retrieve the width and height of the image?

Best regards and thanks in advance
Stefan

"Paul Wötzel" <chef (AT) pp-page (DOT) de> wrote

It doesn't matter which attribute you leave out (width or height) ... always
use height="100%" and there will be no problem with aspect ration.

Hello Paul,
First I want to thank you for your reply.
But I have forgotten to mention that the cells of the table should
have a fixed width and height. The requirement is, that six cells (two
columns and three rows) fit on a A4 format (we need this for a report
which should have a fixed layout).
Then you have two possibilies:
Width of image is greater than height: use width="100%"
Height of image is greater than width: use height="100%"
If you do not, the cells will be expanded and then the six cells do
not fit on the A4 -> Problem here is that you need to know the
dimensions of the image which is not available!
Best regards
Stefan