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為什么刪除不來(lái)節(jié)點(diǎn)？

<!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(){
????????????var?a?=?document.getElementsByTagName("tr");
????????????????for(var?i=0;i<a.length;i++){
????????????????????a[i].onmouseover?=?function?()?{
????????????????????????this.style.backgroundColor?=?"#ccc";
????????????????????}
????????????????????a[i].onmouseout?=?function?()?{
????????????????????????this.style.backgroundColor?=?"#fff";
????????????????????}
????????????????}
????????}//?鼠標(biāo)移動(dòng)改變背景,可以通過(guò)給每行綁定鼠標(biāo)移上事件和鼠標(biāo)移除事件來(lái)改變所在行背景色。

????????//?編寫一個(gè)函數(shù)，供添加按鈕調(diào)用，動(dòng)態(tài)在表格的最后一行添加子節(jié)點(diǎn)；


????????function?dele(obj)?{
????????????var?a?=document.getElementById("table");
????????????var?b?=?obj.parentNode.parentNode;
????????????a.removeChild(b);
????????}
????????//?創(chuàng)建刪除函數(shù)



????</script>
</head>
<body>
<table?border="1"?width="50%"?id="table">
????<tr>
????????<th>學(xué)號(hào)</th>
????????<th>姓名</th>
????????<th>操作</th>
????</tr>

????<tr>
????????<td>xh001</td>
????????<td>王小明</td>
????????<td><a?href="javascript:;"?onclick="dele(this)">刪除</a></td>???<!--在刪除按鈕上添加點(diǎn)擊事件??-->
????</tr>

????<tr>
????????<td>xh002</td>
????????<td>劉小芳</td>
????????<td><a?href="javascript:;"?onclick="dele(this)">刪除</a></td>???<!--在刪除按鈕上添加點(diǎn)擊事件??-->
????</tr>

</table>
<input?type="button"?value="添加一行"??/>???<!--在添加按鈕上添加點(diǎn)擊事件??-->
</body>
</html>

慕碼人0044688

2017-06-17

源自：JavaScript進(jìn)階篇 9-22

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1 回答

奉天
2017-06-19

<!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(){
		Highlight();
	?}??
	?function?addOne(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='deleteRow(this)'>刪除</a>";
		?tr.appendChild(td);???
		?
		?tbody.appendChild(tr);???
		Highlight();
???	?}

	?function?deleteRow(obj){
	????var?tbody?=?document.getElementById('table').lastChild;??
		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";
			}?
		}??
	?}

??</script>?
?</head>?
?<body>?
	???<table?border="1"?width="50%"?id="table">
	???<tr>
		<th>學(xué)號(hào)</th>
		<th>姓名</th>
		<th>操作</th>
	???</tr>??

	???<tr>
		<td>xh001</td>
		<td>王小明</td>
		<td><a?href="javascript:;"?onclick="deleteRow(this)">刪除</a></td>
	???</tr>

	???<tr>
		<td>xh002</td>
		<td>劉小芳</td>
		<td><a?href="javascript:;"?onclick="deleteRow(this)">刪除</a></td>
	???</tr>??

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