<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>动态表格</title>
<style>
table{
border: 1px solid;
margin:0 auto;
width: 500px;
}
td,th{
text-align: center;
border: 1px solid;
}
div{
text-align: center;
margin: 50px;
}
.out{
background-color: white;
}
.over{
background-color: pink;
}
</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>
<caption>学生信息表</caption>
<tr>
<th><input type = "checkbox" name = "cb" id="fir" ></th>
<th>编号</th>
<th>姓名</th>
<th>性别</th>
<th>操作</th>
</tr>
<tr>
<td><input type = "checkbox" name = "cb"></td>
<td>1</td>
<td>马克</td>
<td>男</td>
<td><a href = "javascript:void(0);" onclick="delTr(this);">删除</a></td>
<!-- 这里的方法中的this表示删除该行 ，this在写方法时参数为obj-->
</tr>
<tr>
<td><input type = "checkbox" name = "cb"></td>
<td>2</td>
<td>风清扬</td>
<td>男</td>
<td><a href = "javascript:void(0);" onclick="delTr(this);">删除</a></td>
</tr>
<tr>
<td><input type = "checkbox" name = "cb"></td>
<td>3</td>
<td>童丽</td>
<td>女</td>
<td><a href = "javascript:void(0);" onclick="delTr(this);">删除</a></td>
</tr>
</table>
<div>
<input type="button" value="全选" id = "select_all"/>
<input type="button" value="反选" id = "select_back" />
</div>
<script>
/* //添加方法一：正常
document.getElementById("btn_add").onclick = function(){
//获取文本框内容
var id = document.getElementById("id").value;
var name = document.getElementById("name").value;
var gender = document.getElementById("gender").value;
var td_id = document.createElement("td");
//获取的内容 需要使用textnode来放
var text_id = document.createTextNode(id);
td_id.appendChild(text_id);
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);
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);
var table = document.getElementsByTagName("table")[0];
table.appendChild(tr);
} */
//在页面加载后开始执行
window.onload = function(){
//全选
document.getElementById("select_all").onclick = function(){
var s = document.getElementsByName("cb");
for(var i = 0;i<s.length;i++){
s[i].checked = true;
//复选框的属性checked表示是否选中
}
}
//反选
document.getElementById("select_back").onclick = function(){
var s = document.getElementsByName("cb");
for(var i = 0;i<s.length;i++){
if(s[i].checked){
s[i].checked = false;
}
else{
s[i].checked = true;
}
//复选框的属性checked表示是否选中
}
}
//首框全选
var s = document.getElementById("fir")
s.onclick = function(){
// if(s.checked){
// var m = document.getElementsByName("cb");
// for(var i = 1;i<m.length;i++){
// m[i].checked = true;
// }
// }
var m = document.getElementsByName("cb");
for(var i = 0;i<m.length;i++){
m[i].checked = s.checked;
}
}
//选中该背景色
var trs = document.getElementsByTagName("tr");
for(var i = 0;i<trs.length;i++){
trs[i].onmouseover = function(){
this.className = "over";
}
trs[i].onmouseout = function(){
this.className = "out";
}
}
//innerhtml方法添加
document.getElementById("btn_add").onclick = function(){
//获取文本框内容
var id = document.getElementById("id").value;
var name = document.getElementById("name").value;
var gender = document.getElementById("gender").value;
var table = document.getElementsByTagName("table")[0];
table.innerHTML += "<tr>\n"+
"<td><input type = 'checkbox' name = 'cb'></td>"+
"<td>"+id+"</td>"+
"<td>"+name+"</td>\n"+
"<td>"+gender+"</td>\n"+
"<td><a href = \"javascript:void(0);\" onclick=\"delTr(this);\">删除</a></td>\n"+
"</tr>";
}
//删除
function delTr(obj){
var table = obj.parentNode.parentNode.parentNode;
var tr = obj.parentNode.parentNode;
// 用parentNode属性获取父节点
table.removeChild(tr);
}
}
</script>
</body>
</html>