javascript完成表格的添加和删除功能

new document

window.onload = function(){

Highlight();

}

function addOne(obj){

var tbody = document.getElementById(‘table’).lastChild; //获取的是tbody

var tr = document.createElement(‘tr’);

var td = document.createElement("td");
td.innerHTML = "<input type='text'/>";
tr.appendChild(td);

td = document.createElement("td");
td.innerHTML = "<input type='text'/>";
tr.appendChild(td);

td = document.createElement("td");
td.innerHTML = "<a href='javascript:;' onclick='deleteRow(this)'>删除</a>";
tr.appendChild(td);

tbody.appendChild(tr);
Highlight();//必须有这句
}

function deleteRow(obj){
var tbody = document.getElementById('table').lastChild;  //获取tbody

var tr = obj.parentNode.parentNode;
tbody.removeChild(tr);
}
function Highlight(){
var tbody = document.getElementById('table').lastChild;
trs = tbody.getElementsByTagName('tr');
for(var i =1;i<trs.length;i++){
trs[i].onmouseover = function(){
this.style.backgroundColor ="#f2f2f2";
}
trs[i].onmouseout = function(){
this.style.backgroundColor ="#fff";
}
}
}

<tr>
<td>xh01</td>
<td>王明</td>
<td><a href="javascript:;" onclick="deleteRow(this)">删除</a></td>
</tr>

<tr>
<td>xh02</td>
<td>张军</td>
<td><a href="javascript:;" onclick="deleteRow(this)">删除</a></td>
</tr>

</table>
<input type="button" value="添加一行" onclick="addOne()" />

学号	姓名	操作