How to hide this css in responsive layout?

[Divvy]

Hello guys,

Can someone teach me how can I disable the following code to not appear in my responsive layout?

<div id="supportAd"><strong><u>NEWS</u>:</strong> Testing....</div>

#supportAd {
    background: #222;
    border: solid 1px #a0a0a0;
    width: 933px;
    margin: 0 0 12px 10px;
    line-height: 20px;
    height: 39px;
    text-align: center;
    font-size: 14px;
    color: #ccc
}
#supportAd a {
    color: #ff0000;
}

Thanks

 

[gonliSs]

@media screen and (max-width: 600px) {
   #supportAd
   {
     display: none;
   }
}

Just change the width to the one you want. Is this what you were asking for?