Hey folks, please note I'm new here so if this is in the wrong place please move it.

I'm currently working on a website, and the client wishes to have buttons on the website that have the same effect of the red ones on this site. I understand that with Javascript you can make the image appear on the right hand side of the button when the cursor hovers over it, but I do not know how this is done.

Is there a shortcut to do this in DreamWeaver, that preferably requires minimal coding. Or is an effect like this better off done in flash?

Thanks in advance for any help,