动态增加表格：
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<HTML>
<head>
</head>
<BODY>
<script>
function add(){
var t=document.getElementById("table1");
var tt=t.insertRow();
for(i=0;i<t.rows[0].cells.length;i++) tt.insertCell().innerText='HueVan'+i;
}
</script>
<table id=table1 width=100 height=100 border=1>
<tr><td>1</td><td>2</td><td>3</td></tr>
<td>11</td><td>22</td><td>33</td>
</table>
<input type=button onclick=add() value="增加一行">
</BODY>
</HTML>
**********************
<HTML>
<head>
</head>
<BODY>
<script>
function add(){
var t=document.getElementById("table1");
var tt=t.insertRow();
for(i=0;i<t.rows[0].cells.length;i++) tt.insertCell().innerText='HueVan'+i;
}
</script>
<table id=table1 width=100 height=100 border=1>
<tr><td>1</td><td>2</td><td>3</td></tr>
<td>11</td><td>22</td><td>33</td>
</table>
<input type=button onclick=add() value="增加一行">
</BODY>
</HTML>
<tr id=a1>
<td><input></td><td><input></td>
</tr>
</table>
<input type=button name=ok onclick=add()>
<script language=JavaScript>
i=1
function add(){
var newTR = a1.cloneNode(true);
newTR.id="a"+(++i)
a1.parentNode.insertAdjacentElement("beforeEnd",newTR);
}
</script>