I have a nice logo for one of my sites, but naturally IE6 and earlier can't do alpha transparencies. However, I thought there might be a decent workaround with javascript or something else. I have an acceptable transparent GIF file that doesn't look pretty but will get the job done. Is it possible to show the GIF or the PNG dependent on the browser being used? I tried researching this a bit, but didn't come up with anything very good.