[bzcomputers]

This information below will only work correctly on fixed width sites...

Say for example your site has a fixed width of 800px centered on the screen, and then your side banners are a width of 160px each. That will require a minimum of 1120px total to show everything (without any margins). Now, you can take into account a small margin between ads so everything doesn't show right on top of each other, so we'll add 80px (20px on both the left & right side of each ad) for a total of 1200px.

We'll now need to write css code to say don't show those sidebar ads when the screen is less than 1200px wide.

@media screen and (max-width: 1199px) {
    #RightFloatAds, #LeftFloatAds {
        display: none;
    }
}

You can add this code to additional.css template. Then confirm it is working like desired by manually adjusting your screen width.