<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<table>
<tr>
<td style="border: 1px solid blue;" onmouseover="this.style.borderWidth=2;" onmouseout="this.style.borderWidth=1">
dddddddd
</td>
</tr>
</table>
</BODY>
</HTML>
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
</HEAD><BODY>
<table>
<tr>
<td style="border: 1px solid blue;" onmouseover="this.style.borderWidth=2;" onmouseout="this.style.borderWidth=1">
dddddddd
</td>
</tr>
</table>
</BODY>
</HTML>
td {cursor:default}
</style>
<TABLE style="cursor:hand" border=1 cellspacing=2>
<TR>
<TD>d</TD>
<TD>asdf</TD>
<TD>asdfasd</TD>
</TR>
<TR>
<TD>ssdfa</TD>
<TD>sdfa</TD>
<TD>asdf</TD>
</TR>
</TABLE>
看到了吗？cellspacing是关键
为啥要靠在边框线上，而不是在单元格里？可以考虑用image来做边框线，这样再用它的onmousemove吧