<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
table {
width: 500px;
margin: 100px auto;
border-collapse: collapse;
text-align: center;
}
</style>
</head>
<body>
姓名：<input type="text" id="name"><br>
科目：<input type="text" id="sbj"><br>
成绩：<input type="text" id="grade"><br>
<input type="button" onclick="add()" value="添加">
<table cellspacing="0" border="1">
<thead>
<tr>
<th>姓名</th>
<th>科目</th>
<th>成绩</th>
<th>操作</th>
</tr>
</thead>
<tbody id="lis"></tbody>
</table>
<script>
function add(){
var name=document.getElementById("name").value;
var sbj=document.getElementById("sbj").value;
var grade=document.getElementById("grade").value;
var tr=document.createElement("tr");
var td1=document.createElement("td");
td1.innerHTML=name;
var td2=document.createElement("td");
td2.innerHTML=sbj;
var td3=document.createElement("td");
td3.innerHTML=grade;
var td4=document.createElement("td");
var a=document.createElement("a");
a.setAttribute("href","javascript:void(0)");
a.setAttribute("onclick","del(this)");
a.innerHTML="删除";
td4.appendChild(a);
tr.appendChild(td1);
tr.appendChild(td2);
tr.appendChild(td3);
tr.appendChild(td4);
var lis=document.getElementById("lis");
lis.appendChild(tr);
}
function del(a){
var tr=a.parentNode.parentNode;
var lis=document.getElementById("lis");
lis.removeChild(tr);
}
</script>
</body>
</html>