格式怎么就对不齐了呢?

加一个隐藏的textbox占位<!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 width="950" border="0" cellspacing="0" cellpadding="0" align="center">
<tr>
<td><br></td>
</tr>
<tr height="5">
<td class="pbluebk"></td>
<td class="pbluebk"></td>
</tr>
<tr>
<td class="pbluebk">&nbsp;AAAAAAAAAAA</td>
<td class="pbluebk" align="right" rowspan="3">
<input type="button" onclick="add()" name="tsuika" value="ADD">&nbsp;&nbsp;
</td>
</tr>
</table><table cellspacing="0" cellpadding="5" class="bordercolorpblue" width="950" align="center">
<tr>
<td>
<table id="table5" rules="all" border="1" cellspacing="0" cellpadding="0" align="center" bordercolor="#CCCCCC" width="930"><tr class="colheaderbkblue" align="center">
<td width="55" height="55" rowspan="2">BB<br>CC</td>
<td width="200" height="25">DDDD</td>
<td width="600">EEEE</td>
<td width="80" rowspan="2">GGGG</td>
</tr>
<tr class="colheaderbkblue" align="center">
<td width="200" height="30">FFFF<input type="text" style="visibility:hidden"/></td>
<td>SSSSSSSSSSSS<input type="text"  style="visibility:hidden"/></td>
</tr>
</table>
<br><br>
</td>
</tr>
</table><SCRIPT LANGUAGE="JavaScript">
<!--
function add(){var obj = document.getElementById("table5");newRow1 =obj.insertRow(-1);
var newCell0 = newRow1.insertCell(-1);newCell0.innerHTML = obj.rows[0].cells[0].innerHTML;newCell0.rowSpan='2';
newCell0.height='55';var newCell1 = newRow1.insertCell(-1);
newCell1.innerHTML = obj.rows[0].cells[1].innerHTML;var newCell2 = newRow1.insertCell(-1);newCell2.innerHTML = obj.rows[0].cells[2].innerHTML;
var newCell3 = newRow1.insertCell(-1);
newCell3.innerHTML = obj.rows[0].cells[3].innerHTML;newCell3.rowSpan='2';newRow2 =obj.insertRow(-1);
var newCell4 = newRow2.insertCell(-1);
newCell4.innerHTML = obj.rows[1].cells[0].innerHTML;
newCell4.innerHTML = '<input type="text">';var newCell5 = newRow2.insertCell(-1);
newCell5.innerHTML = obj.rows[1].cells[1].innerHTML;
newCell5.innerHTML = '<input type="text">';}
//-->
</SCRIPT>
</BODY>
</HTML>