<script language="JavaScript" type="text/JavaScript">
function TT(cs){
if(cs.style.display=='')
cs.style.display='none';
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<table width="187" border="0" cellpadding="1" >
<tr>
<td width="91" height="65" align="center">
<table width="91" height="60" border="0" cellspacing="0" id="t1" style="display:none;">
<tr>
<td width="83">大图1</td>
</tr>
</table></td>
<td width="86" align="center">
<table width="91" height="60" border="0" cellspacing="0" id="t2" style="display:none;">
<tr>
<td width="83">大图2</td>
</tr>
</table>
</td>
</tr>
<tr>
<td height="64" align="center">
<table width="91" height="60" border="0" cellspacing="0" id="t3" style="display:none;">
<tr>
<td width="83">大图3</td>
</tr>
</table>
</td>
<td align="center">
<table width="91" height="60" border="0" cellspacing="0" id="t4" style="display:none;">
<tr>
<td width="83">大图4</td>
</tr>
</table>
</td>
</tr>
</table>
<table width="163" height="94" border="0">
<tr>
<td width="76"><a href="" onClick="TT(t1);">小图1</a></td>
<td width="77"><a href="" onClick="TT(t2);">小图2</a></td>
</tr>
<tr>
<td><a href="" onClick="TT(t3);">小图3</a></td>
<td><a href="" onClick="TT(t4);">小图4</a></td>
</tr>
</table>