listBox左右移动

 1  <div style="width:200px; float:left;"> 
 2     <table> 
 3     <tr> 
 4         <td  width="50%"> 
 5         <asp:ListBox ID="ListBox2" runat="server" Height="128px" Width="148px">
 6             <asp:ListItem Value="张三"></asp:ListItem>
 7             <asp:ListItem Value="李四"></asp:ListItem>
 8             <asp:ListItem>王五</asp:ListItem>
 9             </asp:ListBox>
10         </td> 
11         <td> 
12             <asp:Button ID="Button2" runat="server" Text="《"></asp:Button>
13             <asp:Button ID="Button1" runat="server" Text="<"></asp:Button>
14             <asp:Button ID="Button3" runat="server" Text=">"></asp:Button>
15             <asp:Button ID="Button4" runat="server" Text="》"></asp:Button>
16         </td> 
17         <td align="left" width="50%"> 
18              <asp:ListBox ID="ListBox1" runat="server" Height="128px" Width="148px"></asp:ListBox>
19         </td> 
20     </tr> 
21     </table> 
22     </div>