网页设计中怎么让表格只显下边框
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<body><TABLE height="30" cellSpacing="0" cellPadding="0" width="100%" border="0">
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????? <TD></TD>
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????? <TD width="36%"><TABLE cellSpacing="0" cellPadding="0" width="200" border="1">
??????? <TBODY>
????????? <TR align="middle">
??????????? <TD>普</TD>
??????????? <TD>表</TD>
????????? </TR>
????????? <TR align="middle">
??????????? <TD>通</TD>
??????????? <TD>格</TD>
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??????? </TBODY>
????? </TABLE></TD>
????? <TD width="64%">这是一普通的表格</TD>
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????? <TD><BR>
????????? <TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="above">
??????????? <TBODY>
????????????? <TR align="middle">
??????????????? <TD>不怕</TD>
??????????????? <TD>下雨</TD>
????????????? </TR>
????????????? <TR align="middle">
??????????????? <TD>?</TD>
??????????????? <TD>?</TD>
????????????? </TR>
??????????? </TBODY>
????????? </TABLE>
??????? <BR></TD>
????? <TD>只显示上边框</TD>
??? </TR>
??? <TR>
????? <TD><TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="below">
??????? <TBODY>
????????? <TR>
??????????? <TD>?</TD>
??????????? <TD>?</TD>
????????? </TR>
????????? <TR>
??????????? <TD align="middle">下起雨来</TD>
??????????? <TD align="middle">该怎么办</TD>
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??????? </TBODY>
????? </TABLE></TD>
????? <TD>只显示下边框</TD>
??? </TR>
??? <TR>
????? <TD><BR>
????????? <TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="vsides">
??????????? <TBODY>
????????????? <TR>
??????????????? <TD align="middle">上不着天</TD>
??????????????? <TD>?</TD>
????????????? </TR>
????????????? <TR>
??????????????? <TD>?</TD>
??????????????? <TD align="middle">下不着地</TD>
????????????? </TR>
??????????? </TBODY>
????????? </TABLE>
??????? <BR></TD>
????? <TD>只显示左、右边框</TD>
??? </TR>
??? <TR>
????? <TD><TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="hsides">
??????? <TBODY>
????????? <TR>
??????????? <TD>?</TD>
??????????? <TD align="middle">两边走开</TD>
????????? </TR>
????????? <TR>
??????????? <TD align="middle">老子姓王</TD>
??????????? <TD>?</TD>
????????? </TR>
??????? </TBODY>
????? </TABLE></TD>
????? <TD>只显示上、下边框</TD>
??? </TR>
??? <TR>
????? <TD><BR>
????????? <TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="lhs">
??????????? <TBODY>
????????????? <TR>
??????????????? <TD width="100">左右</TD>
??????????????? <TD width="100">?</TD>
????????????? </TR>
????????????? <TR>
??????????????? <TD>为难</TD>
??????????????? <TD>?</TD>
????????????? </TR>
??????????? </TBODY>
????????? </TABLE>
??????? <BR></TD>
????? <TD>只显示左边框</TD>
??? </TR>
??? <TR>
????? <TD><TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="rhs">
??????? <TBODY>
????????? <TR>
??????????? <TD width="100">?</TD>
??????????? <TD align="right" width="100">左右</TD>
????????? </TR>
????????? <TR>
??????????? <TD>?</TD>
??????????? <TD align="right">为难</TD>
????????? </TR>
??????? </TBODY>
????? </TABLE></TD>
????? <TD>只显示右边框</TD>
??? </TR>
??? <TR>
????? <TD><BR>
????????? <TABLE cellSpacing="0" cellPadding="0" width="200" border="1" frame="void">
??????????? <TBODY>
????????????? <TR>
??????????????? <TD align="right">光秃秃</TD>
??????????????? <TD>?</TD>
????????????? </TR>
????????????? <TR>
??????????????? <TD>?</TD>
??????????????? <TD align="left">全脱了</TD>
????????????? </TR>
??????????? </TBODY>
????????? </TABLE></TD>
????? <TD>不显示任何边框</TD>
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??? <TR>
????? <TD colSpan="2"><HR color="black" SIZE="1">
??????? 表格边框的显示与隐藏，是可以用frame参数来控制的。请注意它只控制表格的边框图，而不影晌单元格。<BR>
??????? 只显示上边框 <table?? frame=above><BR>
??????? 只显示下边框 <table frame=below> <BR>
??????? 只显示左、右边框 <table?? frame=vsides><BR>
??????? 只显示上、下边框 <table frame=hsides><BR>
??????? 只显示左边框 <table?? frame=lhs><BR>
??????? 只显示右边框 <table frame=rhs><BR>
??????? 不显示任何边框 <table?? frame=void></TD>
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在table标签里写：
<table frame=below>
