JS 换行写法

    var populatePullUpHtml = function (id) {
        var html = \'<div id="\' + id + \'" class="\' + staticOpts.pullUpClass + \'" style="display: none;">\
               <span class="pullUpIcon"></span><span class="pullUpLabel">上拉加载更多...</span>\
            </div>\';
        return html;
    }