問題出在哪，沒反應，求指點
<!DOCTYPE html>
<html>
?<head>
? <title> new document </title>?
? <meta http-equiv="Content-Type" content="text/html; charset=gbk"/>??
? <script type="text/javascript">
?
????? window.onload = function(){
?????????? light();
?????????
????? }??????
????
????? function light(){
??????? var tbody=document.getElementById("table").lastChild;?
??var trs=tbody.getElementsByTagName("tr");
??????? for(var i=1;i<trs.length;i++)
??????? {
??????????? trs[i].onmouseover=function(){
??????????????? this.style.backgroundColor="#ccc";
??????????? }
??????????? trs[i].onmouseout=function(){
??????????????? this.style.backgroundColor="#fff";
??????????? }
??????? }
?
? }
????
????? // 編寫一個函數，供添加按鈕調用，動態在表格的最后一行添加子節點；
??? function add(obj)
??? {
??????? var tbody=document.getElementById("table").lastChild;
??????? 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="del(this)">刪除</a>";
??????? tr.appendChild(td);
??????? tbody.appendChild(tr);
??????? light();
??? }
??? ??
?? ?
???? // 創建刪除函數
???
???? function del(obj)
???? {
???????? var tbody=document.getElementById("table").lastChild;
???????? var tr=obj.parentNode.parentNode;
???????? tbody.removeChild(tr);
???????
???? }
????
? </script>
?</head>
?<body>
??? <table border="1" width="50%" id="table">
??? <tr>
??<th>學號</th>
??<th>姓名</th>
??<th>操作</th>
??? </tr>?
??? <tr>
??<td>xh001</td>
??<td>王小明</td>
??<td><a href="javascript:;" onclick="del(this)">刪除</a></td>?? <!--在刪除按鈕上添加點擊事件? -->
??? </tr>
??? <tr>
??<td>xh002</td>
??<td>劉小芳</td>
??<td><a href="javascript:;" onclick="del(this)">刪除</a></td>?? <!--在刪除按鈕上添加點擊事件,為什么是this????? -->
??? </tr>?
??? </table>
??? <input type="button" value="添加一行" onclick="add()" />?? <!--在添加按鈕上添加點擊事件? -->
?</body>
</html>
2017-03-14
?1. td.innerHTML="<input type="text"/>";改為td.innerHTML="<input type='text'/>";
2.? td.innerHTML="<a href="javascript:;" onclick="del(this)">刪除</a>";改為td.innerHTML="<a href='javascript:;' onclick='del(this)'>刪除</a>";
2017-03-14
可以了，為什么要把雙引號改為單引號