Banner image size

[dxflw]

Hi and happy new year for everybody?
Question for the coders:
Is possible create a code for this job?

I want to add a banner image but i want that the user can see the image big or small proportionally with the pc monitor of the user

in example:

The image banner are inside to the table

<table width="100%">
<tr>
<td>
<img src="/banner.gif">
</td>
</tr>
</table>

now if the resolution of the monitor is 1280x768 then the pic width can be 392px
and if the resolution of the monitor is 1400x1050 then the pic width can be 465px

-------------------
is tha possible?