Writing a replacement for a popup window, that uses a text box created with css, that "pops up" when you hover over a graphic. It all works great, except the alt text pops up along with the css text box containing my info. Anyway, the only way to get rid of the alt text box and avoid an html error is to have alt=""
But my question is, is this an acceptable thing to do? To set alt to null? Or is it better to just give up this line of thought and use the alt text to display my message?