简单的漂浮层

/*去除IE下抖动*/
*html{background-image:url(about:blank);background-attachment:fixed;}

.piaofu
{
    width: 158px;
    height: 413px;
    position: fixed;
    z-index: 1000;
    right: 35px;
    top: 100px;
    margin-top: 15px; 
    /*IE6下浮动*/
    _top: 150px;
    _position: absolute;
    _bottom: auto;
    _top: expression(eval(document.documentElement.scrollTop+120));
}

标头提示层或便捷功能菜单层：

    <thead>
                            <tr style="position: relative;top: expression((this.offsetParent.scrollTop>this.parentElement.parentElement.offsetTop?this.offsetParent.scrollTop-this.parentElement.parentElement.offsetTop-38:0)-1);">
                                <th class="tdcss" onclick="sortAble('tb',0,'int')">
                                    房间资料分析
                                </th>
                                <th class="tdcss" colspan="4" onclick="sortAble('tb',1,'int')">
                                    本日统计
                                </th>
                                <th class="tdcss" colspan="4" onclick="sortAble('tb',2,'int')">
                                    本月统计
                                </th>
                                <th class="tdcss" colspan="4" onclick="sortAble('tb',3,'int')">
                                    本年统计
                                </th>
                            </tr>
    </thead>

主要是此段代码：

<tr style="position: relative;top: expression((this.offsetParent.scrollTop>this.parentElement.parentElement.offsetTop?this.offsetParent.scrollTop-this.parentElement.parentElement.offsetTop-38:0)-1);" >

至少兼容IE8

<div class="divRight" style="position: relative;">
            <div style="position: absolute;" id="divPosi"></div>
</div>

/*右边漂浮层（checkbox是否漂浮，滚动到一定位置才漂浮）*/
window.onscroll = function () {
            var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
            if (document.getElementById("cbscroll").checked && scrollTop > 454) {
                document.getElementById("divPosi").style.top = (scrollTop - 454) + "px";
            } else {
                document.getElementById("divPosi").style.top = 0;
            }
        }