如何在添加全屏背景

html, body {
    margin:0;
    padding:0;
}

.container {
    height:100%;width:100%;
    /*width: 100%;*/
    border: 1px solid green;
    position:fixed;
    background: url(image/login.jpg) no-repeat;text-align:center;
}

要铺满的div加class=”container”