/// 

/// writes a gif image to the browser and closes the response object
/// 

/// <param name="response">where to write the gif</param>
/// <param name="absolutePath">where to read the gif</param>
public static void WriteGif(System.Web.HttpResponse response,
	string absolutePath) {
	//TODO: cache images in hashmap with filename the key
	FileStream fileStream;
	long length = 0;

	fileStream = new FileStream(absolutePath, FileMode.Open, FileAccess.Read);
	length = fileStream.Length;

	byte[] bBuffer = new byte[(int)length];
	fileStream.Read(bBuffer, 0, (int)length);
	fileStream.Close();

	response.ClearContent();
	response.ContentType = "image/gif";
	response.BinaryWrite(bBuffer);
	response.End();
}