.govde {
            width: 980px;
            height: auto;
            margin: auto;
        }

        .ust {
            background-color: #f3f3f3;
            background-image: -moz-linear-gradient(#f9f9f9, #f3f3f3);
            background-image: -webkit-linear-gradient(#f9f9f9, #f3f3f3);
            background-image: linear-gradient(#f9f9f9, #f3f3f3);
            border-bottom: 1px solid #e5e5e5;
            text-shadow: 0 1px 0 #fff;
            height: 80px;
            line-height: 31px;
            font-size: 13px !important;
            width: 100%;
        }

        /* logo */
        .logo {
            float: left;
            padding: 0 70px;
        }

        /* Reklam Alanı */
        .reklam_alani {
            float: right;
            padding: 9px 70px;
        }

    <div class="govde">
        <div class="ust">
            <div class="logo">
                <img src="./images/logo.png" title="WebSite" />
            </div>

            <div class="reklam_alani">
                <img src="./images/reklamalan.jpg" title="Hemen Reklam Ver !" />
            </div>
        </div>
    </div>