.navbar-header {
    float: left;
    text-align: center;
    width: 100%;
}
.navbar-brand {float:none;}

html {
    position: relative;
    min-height: 100%;
}

footer {
    position: absolute;
    left: 0;
    bottom: 0;
    height: 70px;
    width: 100%;
    overflow: hidden;
}

        #mysearch{
            width: 100%;
            margin-top: 50px;
        }

        .search_box{
            width: 100%;
            margin: auto;
        }