请问如何用CSS控制只显示Table的水平线，而不显示垂直线和边框？
http://topic.csdn.net/t/20020905/16/999202.html
<STYLE TYPE="text/css">
.table1
td{border-bottom:1px solid black}
</STYLE>
</HEAD>
<BODY class="table1">
<TABLE cellspacing="0">
<TR>
<TD>sdf</TD>
<TD>dsf</TD>
<TD>df </TD>
</TR>
<TR>
<TD>sdf </TD>
<TD>sdf </TD>
<TD>sdf</TD>
</TR>
<TR>
<TD>sdf</TD>
<TD>sdf</TD>
<TD>sdf</TD>
</TR>
<STYLE TYPE="text/css">
.table1
td{border-bottom:1px solid black}
</STYLE>
</HEAD>
<BODY class="table1">
<TABLE cellspacing="0">
<TR>
<TD>sdf</TD>
<TD>dsf</TD>
<TD>df </TD>
</TR>
<TR>
<TD>sdf </TD>
<TD>sdf </TD>
<TD>sdf</TD>
</TR>
<TR>
<TD>sdf</TD>
<TD>sdf</TD>
<TD>sdf</TD>
</TR>
