header, nav, section {display: block;}
                header {
                        top:0px;
                        position:relative;
                        height:15em;
                        background-color:transparent;
                        width:100%;
                        color: black;
                        z-index:10;
                }
                nav {
                        bottom:0px;
                        height:40px;
                        left:0px;
                        right:0;
                        position:absolute;
                        width:1200px;
                        margin:0 auto;
                }
                * html nav {
                        top:expression(auto);
                }
                .fixed-navi {
                        top:0px;
                        position:fixed !important;
                        position:absolute;
                }
                * html .fixed-navi {
                        top:expression(documentElement.scrollTop);
                }
@media only screen and  (max-width: 900px) {
 header{height:7.7em;}
 nav {
                        bottom:0px;
                        height:40px;
                        left:0px;
                        position:absolute;
                        width:100%;
                }
 }