如下所示：
<!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=utf-8" />
<title>无标题文档</title>
</head>
<body>
<script type="text/javascript">
//添加方法
function addtr()
{
//var trid=0;
var tab=document.getElementByIdx_x("signFrame");
//添加行
var newTR = tab.insertRow(tab.rows.length);
alert(tab.rows.length);
//trid++;
//获取序号=行索引
var xuhao=newTR.rowIndex.toString();
alert(xuhao);
newTR.id = "tr" + xuhao;
//添加列:序号
var newNameTD=newTR.insertCell(0);
//添加列内容
newNameTD.innerHTML = xuhao;
//添加列:日期
var newNameTD=newTR.insertCell(1);
//添加列内容
newNameTD.innerHTML = "<input name='time" + xuhao + "' id='time" + xuhao + " size='19' onmouseover='this.style.backgroundColor=#6298E1;this.style.color=#000000;' onmouseout='this.style.backgroundColor=#6298E1;this.style.color=#000000;' />";
//添加列:方式
var newEmailTD=newTR.insertCell(2);
//添加列内容
newEmailTD.innerHTML = "<select style='width:70px;' name='way" + xuhao + "' id='way" + xuhao + "'><option value='电话'>电话</option><option value='QQ'>QQ</option> </select>";
//添加列:备注
var newTelTD=newTR.insertCell(3);
//添加列内容
newTelTD.innerHTML = "<input size='60' name='remark" + xuhao + "' id='remark" + xuhao + "' type='text' onclick='showid(this)' />";
//添加列:删除按钮
var newDeleteTD=newTR.insertCell(4);
//添加列内容
newDeleteTD.innerHTML = "<div align='center' style='width:40px'><a href='javascript:;' onclick=\"deltr('tr" + xuhao + "')\">删除</a></div>";
}
</script>
<script type="text/javascript">
//删除其中一行
function deltr(trid)
{ //alert(trid);
var tab=document.getElementByIdx_x("signFrame");
var row=document.getElementByIdx_x(trid);
var index=row.rowIndex;//rowIndex属性为tr的索引值，从0开始
tab.deleteRow(index); //从table中删除
//重新排列序号，如果没有序号，这一步省略
var nextid;
for(i=index;i<tab.rows.length;i++){
tab.rows[i].cells[0].innerHTML = i.toString();
nextid=i+1;
remark=document.getElementByIdx_x("remark"+nextid);
remark.id="remark";
}
}
</script>
<script type="text/javascript">
function showid(txt)
{alert(txt.id);
}
</script>
<body>
<input type="button" value="保存" onclick="addtr()" />
<table border="1px" width="70%" id="signFrame">
<tr id="trHeader">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr id="trHeader">
<td width="50px">序号</td>
<td width="170px">时间</td>
<td width="100px">方式</td>
<td>备注</td>
<td width="80px">操作</td>
</tr>
<tr id="trHeader">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr id="trHeader">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr id="trHeader">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
<tr id="trHeader">
<td> </td>
<td> </td>
<td> </td>
<td> </td>
<td> </td>
</tr>
</table>
</body>
</html>
