本文实例讲述了js实现对table动态添加、删除和更新的方法。分享给大家供大家参考。具体实现方法如下：
<!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>表格操作</title>
<style type="text/css">
body {
font-size: 13px;
line-height: 25px;
}
table {
border-top: 1px solid #333;
border-bottom: 1px solid #333;
width: 300px;
}
td {
border-right: 1px solid #333;
border-bottom: 1px solid #333;
}
.title {
text-align: center;
font-weight: bold;
background: #ccc;
}
.center {
text-align: center;
}
#displayInfo {
color: red;
}
</style>
<script type="text/javascript">
function addRow() { //增加一行
var tableObj = document.getElementById('myTable');
var rowNums = tableObj.rows.length;
var newRow = tableObj.insertRow(rowNums);
var col1 = newRow.insertCell(0);
col1.innerHTML = "幸福从天而降";
var col2 = newRow.insertCell(1);
col2.innerHTML = "$18.5";
col2.align = "center";
var divInfo = document.getElementById('displayInfo');
divInfo.innerHTML = "添加商品成功";
}
function delRow() { //删除第二行
document.getElementById('myTable').deleteRow(1);
var divInfo = document.getElementById('displayInfo');
divInfo.innerHTML = "删除商品成功";
}
function updateRow() { //更新行的信息
var uRow = document.getElementById('myTable').rows[0];
uRow.className = "title";
}
</script>
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" id="mytable">
<tr id="row1">
<td>书名</td>
<td>价格</td>
</tr>
<tr id="row2">
<td>看得见风景的房间</td>
<td class="center">$30.00</td>
</tr>
<tr id="row3">
<td>60个瞬间</td>
<td class="center">$32.00</td>
</tr>
</table>
<input name="b1" type="button" value="增加一行" onclick="javascript:addRow();"/><br />
<input name="b2" type="button" value="删除第二行" onclick="javascript:delRow();"/><br />
<input name="b3" type="button" value="修改标题" onclick="javascript:updateRow();"/><br />
<div id="displayInfo"></div>
</body>
</html>
希望本文所述对大家的javascript程序设计有所帮助。