Hardest of all in my opinion has been the transparent GIF file. It took a lot of searching on the web for a tutorial that finally made sense to me. The first step is to create a solid color in the background like this,  this tells the browser to view a certain color as transparent the color is gray by default but you kind of want to take your eyedropper tool and set it to a color that is going to be in your background most that way you have a better blend of your graphic to your background I picked a blue since the background has a blue in it.for this tutorial you will need adobe photoshop 4.0 or higher and don'tforget to download the plug-in and install it in the 89export file. You can get it at the adobe.com.   After youhave installed the plug-in  and have chosen a solid background color then you are ready to go to you pull down menu file>mode>index color like this tryto stick with color exact but if you can't get into this mode then pick adjacent. Now for the fun part this is what I got stuck on and couldn't figure out, you have this file right, and are in index color mode now allyou have to do is have this browser read it as a transparent file, the trick is going into file>export 89a gift and you take the negative eyedropper tool and click your background till it turns into your default gray I was making reference  to earlier, and here is your output.