!DOCTYPE html html lang= "en" head meta charset= "UTF-8" title动态表格 /title style table { border: 1 px solid ; margin: auto ; width: 500 px ; } td, th { text-align: center ; border: 1 px solid ; } div { text-align: center ; margin: 50
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动态表格</title>
<style>
table {
border: 1px solid;
margin: auto;
width: 500px;
}
td, th {
text-align: center;
border: 1px solid;
}
div {
text-align: center;
margin: 50px;
}
</style>
</head>
<body>
<div>
<input type="text" id="id" placeholder="请输入编号">
<input type="text" id="name" placeholder="请输入姓名">
<input type="text" id="gender" placeholder="请输入性别">
<input type="button" value="添加" id="btn_add">
</div>
<table cellspacing="0" cellpadding="0">
<caption>学生信息表</caption>
<tr>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>操作</th>
</tr>
<tr>
<td>1</td>
<td>令狐冲</td>
<td>男</td>
<td><a href="javascript:void(0);" onclick="delTr(this);">删除</a></td>
</tr>
<tr>
<td>2</td>
<td>任我行</td>
<td>男</td>
<td><a href="javascript:void(0);" onclick="delTr(this);">删除</a></td>
</tr>
<tr>
<td>3</td>
<td>岳不群</td>
<td>?</td>
<td><a href="javascript:void(0);" onclick="delTr(this);">删除</a></td>
</tr>
<script>
/* // 1、获取按钮
document.getElementById("btn_add").onclick =function () {
//2、获取文本框的内容
var id = document.getElementById("id").value;
var name = document.getElementById("name").value;
var gender = document.getElementById("gender").value;
//3、创建td，赋值td的标签体
//id的td
var td_id = document.createElement("td");
var text_id = document.createTextNode(id);
td_id.appendChild(text_id);
//name的td
var td_name = document.createElement("td");
var text_name = document.createTextNode(name);
td_name.appendChild(text_name);
//gender的td
var td_gender = document.createElement("td");
var text_gender = document.createTextNode(gender);
td_gender.appendChild(text_gender);
//a标签的td
var td_a = document.createElement("td");
var ele_a = document.createElement("a");
ele_a.setAttribute("href","javascript:void(0)");
ele_a.setAttribute("onclick","delTr(this);");
var text_a = document.createTextNode("删除");
ele_a.appendChild(text_a);
td_a.appendChild(ele_a);
var tr = document.createElement("tr");
tr.appendChild(td_id);
tr.appendChild(td_name);
tr.appendChild(td_gender);
tr.appendChild(td_a);
document.getElementsByTagName("table")[0].appendChild(tr);
}*/
// 1、获取按钮
document.getElementById("btn_add").onclick = function () {
//2、获取文本框的内容
var id = document.getElementById("id").value;
var name = document.getElementById("name").value;
var gender = document.getElementById("gender").value;
//3、 获取table
var table = document.