                        課程
                    
                        /前端開發(fā)
                        
                            /JavaScript
                        
                        /JavaScript進(jìn)階篇

新添加的tr無法調(diào)用刪除函數(shù)和移入移出改變背景的函數(shù)，應(yīng)該怎么解決

<!DOCTYPE?html>
<html>
?<head>
??<title>?new?document?</title>??
??<meta?http-equiv="Content-Type"?content="text/html;?charset=gbk"/>???
??<style>
??????table{
??????????background:#edf1f2;
??????}
????
??</style>
??<script?type="text/javascript">?
??
??????window.onload?=?function?(){
????????	?//?鼠標(biāo)移動改變背景,可以通過給每行綁定鼠標(biāo)移上事件和鼠標(biāo)移除事件來改變所在行背景色。
??????var?tr=document.getElementsByTagName('tr')?;
??????for(var?i=0;i<tr.length;i++)
		{tr[i].onmousemove=function?(){
		???this.style.background='#ff0';
		???this.onmouseout=function(){
		????????this.style.background='#edf1f2';
		????}
		}
		}
?????????
?????
??????}?????
	
?????
??????//?編寫一個函數(shù)，供添加按鈕調(diào)用，動態(tài)在表格的最后一行添加子節(jié)點(diǎn)；
????function?btn(){
????????var?table=document.getElementById('table');
????????var?r=document.getElementsByTagName('tr').length;
????????var?tr1=document.createElement('tr');
???????for(var?i=0;i<3;i++)
?????????{
?????????????var?td=document.createElement('td');
????????????if(i==0)?{td.innerHTML='xh00'+r;}
????????????else?if(i==1){td.innerHTML='name';}
????????????else{
???????????????/*?var?a=document.createElement('a');
????????????????a.innerHTML='刪除';
????????????????a.href="javascript:;";
????????????????a.onclick='remove()'
????????????????td.appendChild(a)}*/
????????????????td.innerHTML="<a?href='javascript:;'?onclick='remove()'?>?刪除</a>";}
?????????tr1.appendChild(td);
?????????}
?????????
?????table.appendChild(tr1);???
?????
?????var?tr=document.getElementsByTagName('tr')?;
??????for(var?i=0;i<tr.length;i++)
		{tr[i].onmousemove=function?(){
		???this.style.background='#ff0';
		???this.onmouseout=function(){
		????????this.style.background='#edf1f2';
		????}
		}
		}
?????}

??????
?????//?創(chuàng)建刪除函數(shù)
?????function?remove(){
?????????var?e=event||window.event;
?????????e.target.parentNode.parentNode.parentNode.removeChild(e.target.parentNode.parentNode);
?????????
?????????
?????}


??</script>?
?</head>?
?<body>?
	???<table?border="1"?width="50%"?id="table">
	???<tr>
		<th>學(xué)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='remove()'?>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='remove()'?>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"?onclick='btn()'?/>???<!--在添加按鈕上添加點(diǎn)擊事件??-->
?</body>
</html>