DIV+CSS实现左右分栏

                <div id="leftBodyer">
                    侧边栏</div>
                <div id="mainBodyer">
                    主体内容<asp:BulletedList ID="BulletedList1" runat="server" DisplayMode="HyperLink">
                        <asp:ListItem>aaa</asp:ListItem>
                        <asp:ListItem>sss</asp:ListItem>
                    </asp:BulletedList>
                </div>
#leftBodyer {
 width:160px; /*设定宽度*/
 text-align:left; /*文字左对齐*/
 float:left; /*浮动居左*/
 clear:left; /*不允许左侧存在浮动*/
 overflow:hidden; /*超出宽度部分隐藏*/
background-color: #66cc33;
}

#mainBodyer
{
    width: 570px;
    text-align: left;
    float: right; /*浮动居右*/
    clear: right; /*不允许右侧存在浮动*/
    overflow: hidden;
    background-color: #ff9933;
}