利用document.createElement(), appendChild()方法可以动态创建和添加表格
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head>
<script type="text/javascript">
var index = 3; //行数
var number = 4; //序号
var oTR = new Array(); //创建一个TR数组
function add(){
index = index+1;
oTR[index] = document.createElement("tr"); //TR
var oTD = document.createElement("<td>"); //创建TD
oTD.innerHTML = number++;
oTR[index].appendChild(oTD); //添加TR的子元素TD
oTD = document.createElement("<td> </td>")
oTR[index].appendChild(oTD);
oTD = document.createElement("<td> </td>")
oTR[index].appendChild(oTD);
oTD = document.createElement("<td> </td>")
oTR[index].appendChild(oTD);
oTD = document.createElement("<td> </td>")
oTR[index].appendChild(oTD);
document.getElementById("mytbody").appendChild(oTR[index]); //将TR添加到tbody中
}
</script>
<body>
<table border="1" width="40%" align="center">
<tr>
<th>序号</th><th>询价内容</th><th>数量</th><th>单位</th><th>单价(元)</th>
</tr>
<tbody id="mytbody">
<tr>
<td>1</td><td> </td><td> </td><td> </td><td> </td>
</tr>
<tr>
<td>2</td> <td> </td><td> </td><td> </td><td> </td>
</tr>
<tr>
<td>3</td> <td> </td><td> </td><td> </td><td> </td>
</tr>
</tbody>
<tr>
<td colspan="4"> </td><td align="right"><a href="javascript:add()">+增加</a></td>
</tr>
</table>
</body>
</html>
