新手写的代码，用定时器设置ID 然后传递参数的办法 删除tr标签
<!DOCTYPE html>
<html>
<head>
<title> new document </title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<script type="text/javascript">
window.onload = function(){
// 鼠标移动改变背景,可以通过给每行绑定鼠标移上事件和鼠标移除事件来改变所在行背景色。
var table=document.getElementById('table');
var tablebody = table.firstElementChild;
var tablebodytr = tablebody.children; //get tr elements of tables
for (i=1;i<tablebodytr.length;i++) {
tablebodytr[i].setAttribute("onmouseover","this.style.backgroundColor='red'");
tablebodytr[i].setAttribute("onmouseout","this.style.backgroundColor=''");
}
}
//creat tables
function createRows_tables() {
var table=document.getElementById('table');
var tablebody = table.firstElementChild;
var tablebodytr = tablebody.children; //get tr elements of tables
haskell = document.createElement('tr');
haskell.setAttribute("onmouseout","this.style.backgroundColor=''");
haskell.setAttribute("onmouseover","this.style.backgroundColor='red'");
haskell.innerHTML="<td><input type='text' ></td><td><input type='text' ></td><td><a href='javascript:delterTr();' >删除</a></td>"
tablebody.appendChild(haskell)
console.log(table.lastElementChild)
}
// 创建删除函数
function delterTr(a) {
var table=document.getElementById('table');
var tablebody = table.firstElementChild;
var tablebodytr = tablebody.children; //get tr elements of tables
tablebodytr[a].remove()
}
function biaoji() {
//for tables creats id give remove() argements
var table=document.getElementById('table');
var tablebody = table.firstElementChild;
var tablebodytr = tablebody.children; //get tr elements of tables
for (i=1;i<tablebodytr.length;i++) {
tablebodytr[i].setAttribute("tableid",i);
tablebodytr[i].lastElementChild.lastElementChild.setAttribute("href",'javascript:delterTr('+i+')');
console.log(tablebodytr[i].lastElementChild.lastElementChild)
}
console.log(i)
}
setInterval(biaoji,1000);
</script>
</head>
<body>
<table border="1" width="50%" id="table">
<tr id='1'>
<th>学号</th>
<th>姓名</th>
<th>操作</th>
</tr>
<tr id='2' >
<td>xh001</td>
<td>王小明</td>
<td><a href="javascript:;" >删除</a></td> <!--在删除按钮上添加点击事件 -->
</tr>
<tr>
<td>xh002</td>
<td>刘小芳</td>
<td><a href="javascript:);" >删除</a></td> <!--在删除按钮上添加点击事件 -->
</tr>
<tr >
<td>xh003</td>
<td>刘小啊</td>
<td><a href="javascript:;" >删除</a></td> <!--在删除按钮上添加点击事件 -->
</tr>
</table>
<br>
<input type="button" value="添加一行" onclick="createRows_tables()" /> <!--在添加按钮上添加点击事件 -->
tablebodytr[i].setAttribute("onclick","this.remove()");
</body>
</html>
