css+div文字底部对齐

<div id="hdright"><span class="m"><asp:Image ID="imglog" runat="server"/></span></div>
#hdright
{}{
    float: left;
    height:40px;
    position:relative;
}
#hdright span.m{}{position:absolute;bottom:0}

1行3列样式：

<div id="firstrow">
    <div id="hdleft"></div>
    <div id="hdcenter"><img alt="taisol" src="img/taisol_logo.jpg" width="149" height="34" border="0" /></div>
    <div id="hdright"><span class="m"><asp:Image ID="imglog" runat="server"/></span></div>
</div>#firstrow{}{width:100%;height:40px;background-color: #ffffff;clear:right;}
#hdleft
{}{
    float: left;
    width: 4%;
}
#hdcenter
{}{
    float: left;
}