只要在div前加上
<iframe id="aaaa" style="position: absolute; z-index: 9; width: expression(this.nextSibling.offsetWidth);
height: expression(this.nextSibling.offsetHeight); top: expression(this.nextSibling.offsetTop);
left: expression(this.nextSibling.offsetLeft);" frameborder="0"></iframe>
就能解决此问题
例如：
<iframe id="aaaa" style="position: absolute; z-index: 9; width: expression(this.nextSibling.offsetWidth);
height: expression(this.nextSibling.offsetHeight); top: expression(this.nextSibling.offsetTop);
left: expression(this.nextSibling.offsetLeft);" frameborder="0"></iframe>
<div id="divtabEdit" runat="server" class="ap_div_transparence" ondrag="b(this);" ondragstart="a(this);">
<table width=500 cellpadding=0 cellspacing=0 border=0>
<tr>
<td>
公寓号:</td>
<td><asp:TextBox ID=txtFlat runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>
公寓地址:</td>
<td><asp:TextBox ID=txtFlatAddress runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>
公寓电话:</td>
<td><asp:TextBox ID=txtFlatPhoto runat="server"></asp:TextBox></td>
</tr>
<tr>
<td>
楼层数:</td>
<td><asp:TextBox ID=txtFloorCount runat="server"></asp:TextBox></td>
</tr>
<tr>
<td colspan="2" align=center>
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/Admin/Image/Btn_qd.gif" />
<img src="Admin/Image/Btn_qx.gif" onclick="Hidediv()" />
</td>
</tr>
</table>
</div>
