Centering an image within a div

Question

I have already set the border of an image within a div to be none. I now want to center that image within its containing div. I have tried using the mar

Answer 1

Either

banner {
     height:100px;
     text-align:center;
     width:960px;
     padding-bottom:10px;}

or if the img is of specific size then

banner img {
         display:block;
         width: px;
         border:none;
         margin:0 auto;
         }

will work ..