表格生成XML并在下面的文本框中显示！求高手解答！！

[农村的我]

<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<div>
<input type="button" value="新增" onclick="AddRow()" />
<input type="button" value="删除选中行" onclick="DelRow()" />
</div>
</tr>
<tr>
<div style="padding: 6px 0 0 0;">
<table id="tb" border="1">
<tr>
<th class="cell_style1">
单价
</th>
<th class="cell_style1">
数量
</th>
<th class="cell_style1">
总价
</th>
<th class="cell_style2">
备注
</th>
</tr>
<tr>
<td>
<input type="text" class="cell_style1" onclick="SelectRow(this)" onchange="SumZJ(this)" />
</td>
<td>
<input type="text" class="cell_style1" onclick="SelectRow(this)" onchange="SumZJ(this)" />
</td>
<td>
<input type='text' class='cell_style1' onclick='SelectRow(this)' onchange='SumZJ(this)' />
</td>
<td>
<input type="text" class="cell_style2" onclick="SelectRow(this)" />
</td>
</tr>
</table>
</div>
</tr>
<tr>
<div style="padding: 6px 0 0 0;">
<input type="button" value="输出XML" onclick="OutXML()" />
</div>
</tr>
<tr>
<div style="padding: 4px 0 0 0;">
<input id="XML_Text" type="text" style="height: 40px; width: 560px;" />
</div>
</tr>
</table>