我怎样才能给javascript元素一个CSS类？

Question

我有以下代码

var addressPopupMenu = window.createPopup();
function showAddressPopup() {
    var popup = document.getElementById('addressFullSpan');

    popupMenuBody = popupMenu.document.body;
    popupMenuBody.style.backgroundColor = "#336699";
    popupMenuBody.style.border = "solid 2px; white";
    popupMenuBody.style.fontSize="130%";
    popupMenuBody.style.color="white";
    popupMenuBody.style.padding="10px";
    popupMenuBody.style.paddingLeft="30px";

你可以看到我在重复popupMenuBody.style.我怎么能给popupMenuBody.style一个css类,所以我不必为每个弹出窗口重复这个

编辑:它不起作用

我已经添加 popupMenuBody.className = "popups";

.popups
    {
        background-color: #29527A;
        border: solid 2px; white;
        fontSize:120%;
        pcolor:white;
        padding:10px;
        paddingLeft:30px;
        textTransform:capitalize;
    }

也是的,我在我的页面中包含.css,它在页面上的其他位置

Answer 1

popupMenuBody.className = "class_name";