JavaScript DOM方法表格添加删除

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>表格添加删除</title>
<script>
window.onload=function ()
{
var oTab=document.getElementById('tab1'); var oBtn=document.getElementById('btn1');
var oName=document.getElementById('name');
var oAge=document.getElementById('age');
var id=oTab.tBodies[0].rows.length+1; oBtn.onclick=function ()
{
var oTr=document.createElement('tr'); var oTd=document.createElement('td');
oTd.innerHTML=id++; //记录id,避免有行被删除,id发生重复
oTr.appendChild(oTd); var oTd=document.createElement('td');
oTd.innerHTML=oName.value;
oTr.appendChild(oTd); var oTd=document.createElement('td');
oTd.innerHTML=oAge.value;
oTr.appendChild(oTd); var oTd=document.createElement('td');
oTd.innerHTML='<a href="javascript:;">删除</a>';
oTr.appendChild(oTd); oTd.getElementsByTagName('a')[0].onclick=function ()
{
oTab.tBodies[0].removeChild(this.parentNode.parentNode);
}; oTab.tBodies[0].appendChild(oTr);
};
};
</script>
</head> <body>
姓名:<input id="name" type="text" />
年龄:<input id="age" type="text" />
<input id="btn1" type="button" value="添加" />
<table id="tab1" border="1" width="500">
<thead>
<td>ID</td>
<td>姓名</td>
<td>年龄</td>
<td>操作</td>
</thead>
<tbody>
<tr>
<td>1</td>
<td>Blue</td>
<td>27</td>
<td></td>
</tr>
<tr>
<td>2</td>
<td>张三</td>
<td>23</td>
<td></td>
</tr>
<tr>
<td>3</td>
<td>李四</td>
<td>28</td>
<td></td>
</tr>
<tr>
<td>4</td>
<td>王五</td>
<td>25</td>
<td></td>
</tr>
<tr>
<td>5</td>
<td>张伟</td>
<td>24</td>
<td></td>
</tr>
</tbody>
</table>
</body>
</html>
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