<html><head><title></title>
<style type="text/css">
.s{ width : 100px; background : #CCCCFF ; height : 30px ;}
</style><script type="text/javascript">
function fn()
{
var tr = document.createElement("tr");
var td1 = document.createElement("td");
td1.className="s";
td1.innerText="1";
var td2 = document.createElement("tr");
td2.className="s";
td2.innerText="2"; var object = document.getElementById("i");
tr.appendChild("td1");
tr.appendChild("td2");
object.appendChild("tr");
}</script>
</head><body>
<table id="i"></table>
<a href="" onClick="fn()">增加</a>
</body></html>
<style type="text/css">
.s{ width : 100px; background : #CCCCFF ; height : 30px ;}
</style><script type="text/javascript">
function fn()
{
var tr = document.createElement("tr");
var td1 = document.createElement("td");
td1.className="s";
td1.innerText="1";
var td2 = document.createElement("tr");
td2.className="s";
td2.innerText="2"; var object = document.getElementById("i");
tr.appendChild("td1");
tr.appendChild("td2");
object.appendChild("tr");
}</script>
</head><body>
<table id="i"></table>
<a href="" onClick="fn()">增加</a>
</body></html>
<style type="text/css">
.s{ width : 100px; background : #CCCCFF ; height : 30px ;}
</style><script type="text/javascript">
function fn()
{
var table=document.getElementById("i");
var row=table.insertRow(0);
var cell1=row.insertCell(0);
var cell2=row.insertCell(1);
cell1.className="s";
cell1.innerHTML="1";
cell2.className="s";
cell2.innerHTML="2";
}</script>
</head><body>
<table id="i"><tr><td/></tr><tr><td/></tr></table>
<a href="javascript:fn()">增加</a>
</body></html>
tr.appendChild("td2");
object.appendChild("tr");
添加的是对象 不能用双引号 onclick函数后面加上 return false
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>无标题页</title><style type="text/css">
.s{ width : 100px; background : #CCCCFF ; height : 30px ;}
</style><script type="text/javascript">
function fn()
{
var tr = document.createElement("tr");
var td1 = document.createElement("td");
td1.className="s";
td1.innerText="1";
var td2 = document.createElement("td");
td2.className="s";
td2.innerText="2"; var object = document.getElementById("i");
tr.appendChild(td1);
tr.appendChild(td2);
object.appendChild(tr);
}</script>
</head><body>
<table id="i"></table>
<a href="" onclick="fn();return false;">增加</a>
</body>
</html>
<style type="text/css">
.s{ width : 100px; background : #CCCCFF ; height : 30px ;}
</style><script type="text/javascript">
function fn()
{
var tr = document.createElement("tr");
var td1 = document.createElement("td");
td1.className="s";
td1.innerText="1";
var td2 = document.createElement("tr");
td2.className="s";
td2.innerText="2"; var object = document.getElementById("i");
tr.appendChild(td1);
tr.appendChild(td2);
object.appendChild(tr);
return true;
}</script>
</head><body>
<table id="i"></table>
<a href="#" onClick="fn()">增加</a>
</body>