請看下面的html
<html>
????
<body>
????????
<TABLE?cellSpacing="0"?cellPadding="0"?width="100%"?border="1"?>
????????????
<TBODY>
????????????????
<TR?height="30">
????????????????????
<TD?style="WIDTH:?12px"></TD>
????????????????????
<TD?class="BigCaption"?style="WIDTH:?150px">Web?Domain?:&nbsp;<SPAN?class="WarningDescription">*</SPAN>
????????????????????
</TD>
????????????????????
<TD>
????????????????????????
<SELECT?id="DWT189WebDomain"/>
????????????????????
</TD>
????????????????
</TR>
????????????????
<TR>
????????????????????
<TD></TD>
????????????????????
<TD?vAlign="top"?colSpan="2">
????????????????????????asfdassdgsdgfsdgfsdgfsdfffffffffffffffffffffffffffffffffffffffffffffsdgfsdfgsdgsdgfsdgfsdgsdg
????????????????????
</TD>
????????????????
</TR>
????????????
</TBODY>
????????
</TABLE>
????
</body>
</html>

顯示這個頁面,含有Web Domain的TD的實際長度絕對大于150px的。因為受第二行的colSpan的屬性影響了
<html>
????
<body>
????????
<TABLE?cellSpacing="0"?cellPadding="0"?width="100%"?border="1"?style="table-layout:fixed"?>
????????????
<TBODY>
????????????????
<TR?height="30">
????????????????????
<TD?style="WIDTH:?12px"></TD>
????????????????????
<TD?class="BigCaption"?style="WIDTH:?150px">Web?Domain?:&nbsp;<SPAN?class="WarningDescription">*</SPAN>
????????????????????
</TD>
????????????????????
<TD>
????????????????????????
<SELECT?id="DWT189WebDomain"/>
????????????????????
</TD>
????????????????
</TR>
????????????????
<TR>
????????????????????
<TD></TD>
????????????????????
<TD?vAlign="top"?colSpan="2">
????????????????????????asfdassdgsdgfsdgfsdgfsdfffffffffffffffffffffffffffffffffffffffffffffsdgfsdfgsdgsdgfsdgfsdgs
????????????????????
</TD>
????????????????
</TR>
????????????
</TBODY>
????????
</TABLE>
????
</body>
</html>

這才是我要的效果!呵呵!