请教如何将td里的内容格式化为整数然后进行乘积运算。。
在数量中输入数字后,合计就能得到结果
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<HTML>
<HEAD>
<title>OA_Missive_Add</title>
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
<LINK href="../../css/web_main.css" type="text/css" rel="stylesheet">
<script>
function get_num()
{
aValue = document.getElementsByName('input_61')[0].value;
bValue = Number(document.getElementsByName('td7_1')[0].value);
document.getElementsByName('input_81')[0].value = aValue * bValue;
}
</script>
</HEAD>
<body MS_POSITIONING="FlowLayout">
<form name="Form1" method="post" >
<table cellpadding="4" cellspacing="1" bgcolor="#333333">
<tr valign="top" align="Center" bgcolor="#ffffff">
<td valign="Top" align="Center">序号</td>
<td valign="Top" align="Center">系列产品</td>
<td valign="Top" align="Center">产品名称</td>
<td valign="Top" align="Center">包装</td>
<td valign="Top" align="Center">型号</td>
<td valign="Top" align="Center">数量(6瓶/件)</td>
<td valign="Top" align="Center">价格</td>
<td valign="Top" align="Center">合计</td>
<td valign="Top" align="Center">备注</td>
</tr>
<tr id="tr1" valign="top" bgcolor="#ffffff">
<td id="td1_1" width="50" align="Center">1</td>
<td id="td2_1" width="100" align="Center">酒系统</td>
<td id="td3_1" width="100" align="Center">酒2001</td>
<td id="td4_1" width="100" align="Center">瓶装</td>
<td id="td5_1" width="100" align="Center">250ML</td>
<td width="60" align="Center"><input name="input_61" type="text" id="input_61" style="input:font-size: 9pt;border: 1px solid #666666;;" onBlur="get_num()" size="6" /></td>
<td id="td7_1" width="100" align="Center">50</td>
<td width="50" align="Center"><input name="input_81" id="input_81" type="text" style="input:font-size: 9pt;border: 1px solid #666666;;" size="5" /></td>
<td width="50"><input name="input_91" id="input_91" type="text" style="input:font-size: 9pt;border: 1px solid #666666;;" size="20" /></td>
</tr>
</table>
</form>
</body>
</HTML>