function AddField()
{
var oRow;
var oCell;
oRow = document.all("FieldTable").insertRow();
var row = document.all("FieldTable").rows.length ;
oCell = oRow.insertCell();
oCell.innerHTML = "<input type='checkbox' name='oCheckBox12' FN='F" + row.toString() + "' style='WIDTH: 30px'>" ;
oCell = oRow.insertCell();
oCell.innerHTML = "<input class='inputin_one1' type='text' style='WIDTH: 120px'' name='F" + row.toString() + "_1'>" ;
oCell = oRow.insertCell();
oCell.innerHTML = "<input class='inputin_one1' type='text' style='WIDTH: 80px' name='F" + row.toString() + "_2'>" ;
oCell = oRow.insertCell();
oCell.innerHTML = "<SELECT name='F" + row.toString() + "_3' style='WIDTH: 80px'><OPTION value='1'>字符型</OPTION><OPTION value='2'>数字型</OPTION><OPTION selected value='3'>日期型</OPTION></SELECT>" ;
}
{
var oRow;
var oCell;
oRow = document.all("FieldTable").insertRow();
var row = document.all("FieldTable").rows.length ;
oCell = oRow.insertCell();
oCell.innerHTML = "<input type='checkbox' name='oCheckBox12' FN='F" + row.toString() + "' style='WIDTH: 30px'>" ;
oCell = oRow.insertCell();
oCell.innerHTML = "<input class='inputin_one1' type='text' style='WIDTH: 120px'' name='F" + row.toString() + "_1'>" ;
oCell = oRow.insertCell();
oCell.innerHTML = "<input class='inputin_one1' type='text' style='WIDTH: 80px' name='F" + row.toString() + "_2'>" ;
oCell = oRow.insertCell();
oCell.innerHTML = "<SELECT name='F" + row.toString() + "_3' style='WIDTH: 80px'><OPTION value='1'>字符型</OPTION><OPTION value='2'>数字型</OPTION><OPTION selected value='3'>日期型</OPTION></SELECT>" ;
}
<TR height="12">
<TD style="FONT-SIZE: 12px" noWrap bgcolor='#e6ecff' align='middle' valign='center' height="25" width="30">选择</TD>
<TD style="FONT-SIZE: 12px" noWrap bgcolor='#e6ecff' align='middle' valign='center' height="25" width="120">字段描述</TD>
<TD style="FONT-SIZE: 12px" noWrap bgcolor='#e6ecff' align='middle' valign='center' height="25" width="80">字段名</TD>
<TD style="FONT-SIZE: 12px" noWrap bgcolor='#e6ecff' align='middle' valign='center' height="25" width="80">字段类型</TD>
</TR>
<TR id="FieldMather_Row" height="12">
<TD><input type="checkbox" name="oCheckBox12" style='WIDTH: 30px'></TD>
<TD><input class="inputin_one1" type="text" name="FDesc" style='WIDTH: 120px'></TD>
<TD><input class="inputin_one1" type="text" name="FName" style='WIDTH: 80px'></TD>
<TD><SELECT id="FType" style='WIDTH: 80px'><OPTION value="1">字符型</OPTION>
<OPTION value="2">数字型</OPTION>
<OPTION selected value="3">日期型</OPTION>
</SELECT></TD>
</TR>
</TABLE>
<TABLE class="wenzi" cellSpacing="1" cellPadding="2" align="left" border="0" width="100%">
<tr width="310">
<td align="right" width="60"></td>
<td align="right" width="80"><input class="anniu" onclick="DelField()" type="button" value="删除字段"></td>
<td width="120">
<input class="anniu" onclick="AddField()" type="button" value="新增字段"></td>
<td width="80" align="right">
<input class="anniu" onclick="SaveField()" type="button" value="保存字段"></td>
</tr>
</table>
<input type="button" onclick="getTR()" value="getTR">
<table id="tb"></table>
<script>
function getTR()
{
alert(tb.rows[0].cells[0].innerText); //第一行第一列的数据.
}
function addTR()
{
var row = tb.insertRow();
var cell = row.insertCell();
cell.innerText = "baobao";
}
</script>