cookie and image

[Bert Melis]

I've got a graphical counter which is called by a img-tag in the html. <img
scr="counter.ph p" alt="counter">

The counter.php-file first put the header
Header("Content-type: image/png");
and then puts the image.

Is it possible to put a cookie first, prior to the header of the image?
Otherwise the countyer increases every time the page is refreshed....