using ImageGIF

Im trying to show gif images on a browser, since on my work. Not all are using Internet explorer on windows. One of my test shows on a Mac OS X 10.1 IE 5.5 the jpeg and png files are not supported and only gif images. I tried this syntax to generate gif files.. --php code-- $im = ImageCreate(200, 200); $white = ImageColorAllocate($im, 0xFF, 0xFF, 0xFF); $black = ImageColorAllocate($im, 0x00, 0x00, 0x00); ImageFilledRectangle($im, 50, 50, 150, 150, $black); header("Content-Type: image/gif"); ImageGIF($im); --php code-- but the browser returns an error on the image.. ("The image http://url cannot be displayed, because it contains errors.") And how would you know that gif is supported? PNG and JPEG is shown on phpinfo(); -- - Louie Miranda http://www.axishift.com