<div id="content" class="container">
            <div class="four columns banner">
                <div id="banner_a3da" class="banner_img">
                <a href="./page_a3da.html" rel="external"><img src="page_home/banner_A3DA.jpg"></a>
                </div>
            </div>
            <div class="four columns banner">
                 <div id="banner_fi" class="banner_img">
                    <img src="page_home/banner_FI.jpg">
                 </div>
            </div>
</div>

/* Base Grid */
    .container .four.columns                    { width: 220px; }

.banner or .container.banner or .container.four.columns.banner { width:100% }