<script>
function fun1(a,b) {
alert(a);
}
fun1(3);
var fun2 = function (a,b) {
alert(b);
}
document.write(fun1.length);
//求任意个数的和
function add() {
var sum = 0;
for(var i = 0; i < arguments.length; i++){
sum += arguments[i];
}
return sum;
}
</script>
<script>
//取1-100之间的整数
var number = Math.random();
number = number * 100;
var num = Math.floor(number);
num += 1;
document.write(num);
</script>
<script>
var reg = new RegExp("\\w{6,12}");
var reg2 = /\w{6,12}/;
var username = "zhangsan";
var flag = reg.test(username);
// document.write(flag);
alert(flag);
</script>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<!--内部JS
外部JS-->
</head>
<body>
<img src="../HTMLandCSS/img/logo.jpg" id="p1">
<h1 id="title">悔创阿里杰克马</h1>
<script>
var e1 = document.getElementById("p1");
var title = document.getElementById("title");
alert("我要换内容了");
title.innerHTML = "还是京东好";
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<img src="img/off.gif" id="p1">
<script>
//1.获取图片对象
var p1 = document.getElementById("p1");
var flag = false; //代表灯是灭的
function f1() {
if(flag){ //如果灯开着就灭掉
p1.src = "img/off.gif";
flag = false;
}else {
p1.src = "img/on.gif";
flag = true;
}
}
p1.onclick = f1;
</script>
</body>
</html>
<body>
<input type="button" value="前往网页" id="tag_id1">
<input type="button" value="关闭网页" id="tag_id2">
<script>
var tag1 = document.getElementById("tag_id1");
var tag2 = document.getElementById("tag_id2");
var obj;
tag1.onclick = function () {
obj = open("https://www.baidu.com");
};
tag2.onclick = function () {
obj.close();
}
</script>
</body>
var id = setInterval("alert(‘boom‘)",3000); clearInterval(id);
<body>
<img src="../img/off.gif" id="pp">
<script>
var pid = document.getElementById("pp");
var num = 1;
function switchPicture() {
num ++;
if(num % 2==0){
pid.src = "../img/off.gif";
}else if(num % 2 == 1){
pid.src = "../img/on.gif";
}
}
setInterval(switchPicture,2000);
</script>
</body>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
p{
text-align: center;
}
span{
color: red;
}
</style>
</head>
<body>
<p>
<span id="time">5</span>秒后跳转至首页
</p>
<script>
//通过定时器实现倒计时
var second = 5;
var time = document.getElementById("time");
function showtime() {
//时间如果小于0，则跳转
second --;
if(second <= 0){
location.href = "https://www.baidu.com";
}
time.innerHTML = second + "";
}
setInterval(showtime,1000);
</script>
</body>
</html>
<body>
<a>点我试试</a>
<input type="button" id="tag_button" value="给超链接设置网页">
<script>
//获取这个a标签元素
var ele_a = document.getElementsByTagName("a")[0];
//拿到按钮
var ele_button = document.getElementById("tag_button");
//给按钮绑定事件
ele_button.onclick = function () {
ele_a.setAttribute("href","https://www.baidu.com");
};
</script>
</body>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Node</title>
<style>
div{
border: 1px solid red;
}
#div1{
height: 200px;
width: 200px;
}
#div2{
height: 100px;
width: 100px;
}
</style>
</head>
<body>
<div id="div1">
<div id="div2">div2</div>
div1
</div>
超链接功能：
1.可以被点击；有样式
2.点击后跳转到href指定的url
需求：保留功能1，去掉功能2
实现：href="javascript:void(0);"
<a href="javascript:void(0);">删除子节点</a>
<script>
var ele_a = document.getElementsByTagName("a")[0];
//给超链接对象绑定点击事件
ele_a.onclick = function () {
//获取div1这个父节点对象
var ele_div1 = document.getElementById("div1");
var ele_div2 = document.getElementById("div2");
ele_div1.removeChild(ele_div2);
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动态表格</title>
<style>
div{
text-align: center;
margin: 50px;
}
table{
border: 1px solid;
margin: auto;
width: 500px;
}
td,th{
text-align: center;
border: 1px solid;
}
</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>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>小龙女</td>
<td>女</td>
<td><a href="javascript:void (0);" onclick="delTr(this);">删除</a></td>
</tr>
</table>
<script>
/*
添加：
1.给添加按钮绑定单击事件
2.获取文本框的内容
3.创建td，去设置td的文本为文本框的内容
4.创建tr
5.将td添加到tr中
6.获取table，将tr添加到table 中
删除：
1.确定删除的是哪一个超链接
<a href="javascript:void (0);" onclick="del_tr(this)">
2.怎么删除
*/
//1.获取按钮
document.getElementById("btn_add").onclick = function () {
//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;
//创建td，赋值td的标签体
var td_id = document.createElement("td");
//文本节点才能放入
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);
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 a = document.createElement("a");
var text_a = document.createTextNode("删除");
a.appendChild(text_a);
a.setAttribute("href","javascript:void(0);");
a.setAttribute("onclick","delTr(this);");
td_a.appendChild(a);
//创建tr
var tr = document.createElement("tr");
//添加td到tr中
tr.appendChild(td_id);
tr.appendChild(td_name);
tr.appendChild(td_gender);
tr.appendChild(td_a);
//获取table
var table = document.getElementsByTagName("table")[0];
table.appendChild(tr);
//删除方法
function delTr(obj) {
var table = obj.parentNode.parentNode.parentNode;
//获取tr对象
var tr = obj.parentNode.parentNode;
table.removeChild(tr);
alert(obj);
}
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>动态表格</title>
<style>
div{
text-align: center;
margin: 50px;
}
table{
border: 1px solid;
margin: auto;
width: 500px;
}
td,th{
text-align: center;
border: 1px solid;
}
</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>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>小龙女</td>
<td>女</td>
<td><a href="javascript:void (0);" onclick="delTr(this);">删除</a></td>
</tr>
</table>
<script>
/*
添加：
1.给添加按钮绑定单击事件
2.获取文本框的内容
3.创建td，去设置td的文本为文本框的内容
4.创建tr
5.将td添加到tr中
6.获取table，将tr添加到table 中
删除：
1.确定删除的是哪一个超链接
<a href="javascript:void (0);" onclick="del_tr(this)">
2.怎么删除
*/
//1.获取按钮
document.getElementById("btn_add").onclick = function () {
//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;
var ele_table = document.getElementsByTagName("table")[0];
//向table里添加
ele_table.innerHTML += "<tr>\n" +
" <td>"+id+"</td>\n" +
" <td>"+name+"</td>\n" +
" <td>"+gender+"</td>\n" +
" <td><a href=\"javascript:void (0);\" onclick=\"delTr(this);\">删除</a></td>\n" +
" </tr>";
//删除方法
function delTr(obj) {
var table = obj.parentNode.parentNode.parentNode;
//获取tr对象
var tr = obj.parentNode.parentNode;
table.removeChild(tr);
alert(obj);
}
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="div1"> div </div>
<script>
var ele_div1 = document.getElementById("div1");
ele_div1.onclick = function () {
ele_div1.style.border = "1px solid red";
//font-size --> fontSize
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.d1{
border: 1px solid red;
}
</style>
</head>
<body>
<div id="div1"> div </div>
<script>
var ele_div1 = document.getElementById("div1");
ele_div1.onclick = function () {
ele_div1.className = "d1";
}
</script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
window.onload = function(){
var ele_1 = document.getElementById("tag1");
ele_1.onmousedown = function (event) {
if(event.button==0){
alert("左键被按下了");
}
}
}
</script>
</head>
<body>
<input type="text" id="tag1">
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
window.onload = function(){
var ele_1 = document.getElementById("tag1");
ele_1.onkeydown = function (event) {
if(event.keyCode == 13){
alert("提交表单 、");
}
}
}
</script>
</head>
<body>
<input type="text" id="tag1">
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
function checkForm() {
//校验用户名格式是否正确
var flag = true;
return flag;
}
</script>
</head>
<body>
<form action="#" onsubmit="return checkForm();">
<input type="text" id="tag1" name="username">
<input type="submit" value="提交">
</form>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
table{
border: 1px solid;
width: 500px;
margin-left: 30%;
}
td,th{
text-align: center;
border: 1px solid;
}
div{
margin-top: 10px;
margin-left: 30%;
}
.over{
background-color: deeppink;
}
.out{
background-color: white;
}
</style>
<script>
/*
分析：
1.全选：
*获取所有的checkbox
*遍历cb，设置每一个cb的状态为选中 checked属性
*/
//1.在页面加载完后绑定事件
window.onload = function () {
//2.给全选按钮绑定单击事件
document.getElementById("selectAll").onclick = function () {
//全选功能，获取所有checkbox
var cbs = document.getElementsByName("cb");
//遍历
for(var i = 0;1 < cbs.length; i++){
//设置每一个checked属性为true
cbs[i].checked = true;
}
}
//3.给给不选按钮绑定单击事件
document.getElementById("unSelectAll").onclick = function () {
//全不选功能，获取所有checkbox
var cbs = document.getElementsByName("cb");
//遍历
for(var i = 0;1 < cbs.length; i++){
//设置每一个checked属性为false
cbs[i].checked = false;
}
}
//反选事件
document.getElementById("selectRev").onclick = function () {
//全选功能，获取所有checkbox
var cbs = document.getElementsByName("cb");
//遍历
for(var i = 0;1 < cbs.length; i++){
cbs[i].checked = !cbs[i].checked;
}
}
//第一个cb点击
document.getElementById("first_cb").onclick = function () {
//获取所有checkbox
var cbs = document.getElementsByName("cb");
//遍历
for(var i = 0;1 < cbs.length; i++){
//设置每一个的状态和第一个的一样，this是onclick绑定的第一个cb
cbs[i].checked = this.checked;
}
}
//给所有的tr绑定一个移到元素之上和移除事件
var trs = document.getElementsByTagName("tr");
//遍历
for(var i = 0; i < trs.length; i++ ){
//移到元素之上
trs[i].onmouseover = function () {
this.className = "over";
};
//移出元素
trs[i].onmouseout = function () {
this.className = "out";
}
}
}
</script>
</head>
<body>
<table>
<caption>学生信息表</caption>
<tr>
<th><input type="checkbox" name="cb" id="first_cb"></th>
<td>编号</td>
<td>姓名</td>
<td>性别</td>
<td>操作</td>
</tr>
<tr>
<th><input type="checkbox" name="cb"></th>
<td>1</td>
<td>令狐冲</td>
<td>男</td>
<td><a href="javascript:void(0);">删除</a></td>
</tr>
<tr>
<th><input type="checkbox" name="cb"></th>
<td>2</td>
<td>任我行</td>
<td>男</td>
<td><a href="javascript:void(0);">删除</a></td>
</tr>
<tr>
<th><input type="checkbox" name="cb"></th>
<td>3</td>
<td>岳不群</td>
<td>？</td>
<td><a href="javascript:void(0);">删除</a></td>
</tr>
</table>
<div>
<input type="button" id="selectAll" value="全选">
<input type="button" id="unSelectAll" value="全不选">
<input type="button" id="selectRev" value="反选">
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>注册页面</title>
<style>
body{
background: url("../../HTMLandCSS/img/register_bg.png") no-repeat center;
}
/*让所有元素都挨近 上下两行字*/
*{
margin: 0px;
padding: 0px;
}
/*给最外层框框定义*/
.register_layout{
width: 900px;
height: 500px;
border: 8px solid #EEEEEE;
background-color: white;
/*让div水平居中*/
margin: auto;
margin-top: 25px;
}
.rg_left{
/*border: 1px solid red;*/
float: left;
margin: 15px;
}
.rg_center{
/*border: 1px solid red;*/
float: left;
width: 450px;
margin-top: 20px;
margin-left: 30px;
}
.rg_right{
/*border: 1px solid red;*/
float: right;
margin: 10px;
}
/*选择左边div下的第一个p标签*/
.rg_left > p:first-child{
color:#FFD026;
font-size:20px;
}
/*选择左边div下的最后一个p标签*/
.rg_left > p:last-child{
color:#A6A6A6;
font-size: 20px;
}
.rg_right p a {
color: palevioletred;
}
/*表格中所有左侧的元素*/
.td_left{
width: 100px;
height: 45px;
text-align: right;
}
.td_right{
padding-left: 50px;
}
#username,#password,#email,#name,#tel,#checkcode,#birthday{
width: 160px;
height: 26px;
border: 1px solid #A6A6A6;
/*设置边框圆角*/
border-radius: 5px;
padding-left: 10px;
}
#checkcode{
width: 100px;
}
#img_check{
height: 32px;
/*设置垂直居中*/
vertical-align: middle;
}
#sub{
width: 120px;
height: 40px;
background-color: #FFD026;
border: 1px solid #FFD026;
margin-left: 80px;
}
.error{
color: red;
}
#td_sub{
padding-left: 130px;
}
</style>
<script>
/*
分析：
1.给表单绑定onsubmit事件，监听器中判断每一个方法的校验结果
如果都为true，则监听器方法返回true
如果有一个为false，则监听器方法方法返回false
2.定义一些方法，分别校验各个表单项
3.给各个表单项绑定onblur离焦事件
*/
window.onload = function () {
//1.给表单绑定onsubmit事件
document.getElementById("form").onsubmit = function () {
//调用用户名校验方法、密码校验方法 checkUserName checkPassword
return checkUserName() && checkPassword();
}
//给用户名和密码框分别绑定离焦事件 注意：只要函数对象！！！不要方法执行
document.getElementById("username").onblur = checkUserName;
document.getElementById("password").onblur = checkPassword;
};
//校验用户名
function checkUserName() {
//1.获取用户名的值
var username = document.getElementById("username").value;
//2.定义正则表达式
var reg_username = /^\w{6,12}$/;
//3.判断值是否符合正则的规则
var flag = reg_username.test(username);
//4.提示信息
//通过span标签来添加后面的图片或者文字提示
var s_username = document.getElementById("s_username");
if(flag){
//提示绿色对勾
s_username.innerHTML = "<img width=‘35px‘ height=‘25px‘ src=‘../img/on.gif‘/>"
}else {
//提示红色的用户名有误
s_username.innerHTML = "用户名格式有误";
}
}
//校验密码
function checkPassword() {
//1.获取用户名的值
var password = document.getElementById("password").value;
//2.定义正则表达式
var reg_password = /^\w{6,12}$/;
//3.判断值是否符合正则的规则
var flag = reg_password.test(password);
//4.提示信息
//通过span标签来添加后面的图片或者文字提示
var s_password = document.getElementById("s_password");
if(flag){
//提示绿色对勾
s_password.innerHTML = "<img width=‘35px‘ height=‘25px‘ src=‘../img/off.gif‘/>"
}else {
//提示红色的用户名有误
s_password.innerHTML = "密码格式有误";
}
}
</script>
</head>
<body>
<div class="register_layout">
<div class="rg_left">
<p>新用户注册</p>
<p>USER REGISTER</p>
</div>
<div class="rg_center">
<div class="rg_form">
<!--中间的表格-->
<form action="#" method="get" id="form">
<table>
<tr>
<td class="td_left"><label for="username">用户名</label></td>
<td class="td_right"><input type="text" name="username" id="username" placeholder="请输入用户名">
<span id="s_username" class="error"></span>
</td>
</tr>
<tr>
<td class="td_left"><label for="password">密码</label></td>
<td class="td_right"><input type="password" name="password" id="password" placeholder="请输入密码">
<span id="s_password" class="error"></span>
</td>
</tr>
<tr>
<td class="td_left"><label for="email">email</label></td>
<td class="td_right"><input type="email" name="email" id="email" placeholder="请输入email"></td>
</tr>
<tr>
<td class="td_left"><label for="name">姓名</label></td>
<td class="td_right"><input type="text" name="name" id="name" placeholder="请输入姓名"></td>
<tr>
<td class="td_left"><label for="tel">手机号</label></td>
<td class="td_right"><input type="text" name="tel" id="tel" placeholder="请输入手机号"></td>
</tr>
<tr>
<td class="td_left"><label>性别</label></td>
<td class="td_right">
<input type="radio" name="gender" value="male">男
<input type="radio" name="gender" value="female">女
</td>
</tr>
<tr>
<td class="td_left"><label for="birthday">出生日期</label></td>
<td class="td_right"><input type="date" name="birthday" id="birthday" placeholder="请输入生日"></td>
</tr>
<tr>
<td class="td_left"><label for="checkcode">验证码</label></td>
<td class="td_right"><input type="text" name="checkcode" id="checkcode" placeholder="请输入验证码"><img src="../../HTMLandCSS/img/verify_code.jpg" id="img_check"></td>
</tr>
<tr>
<td colspan="2" id="td_sub"><input type="submit" value="注册" id="sub"></td>
</tr>
</table>
</form>
</div>
</div>
<div class="rg_right">
<p>已有账号?<a href="#">立即登录</a></p>
</div>
</div>
</body>
</html>
原文：https://www.cnblogs.com/caixiaowu/p/13156338.html