Web Front-end
JS Tutorial
Comprehensive examples of javascript image switching (cyclic switching, sequential switching)_javascript skills
Comprehensive examples of javascript image switching (cyclic switching, sequential switching)_javascript skills
The example in this article introduces two methods of javascript image switching, the example code of cyclic switching and sequential switching, and is shared with you for your reference. The specific content is as follows
<html>
<head>
<meta charset="utf-8">
<style>
p{margin:0;}
input{border:none;outline: none;margin:0;padding:0;}
img{width:300px;height:300px;}
#loop{margin-left:50px;background:#c80;width:60px;height:40px;font-size:14px;line-height:20px;text-align: center;}
#order{margin-left:50px;background:#c80;width:60px;height:40px;font-size:14px;line-height:20px;text-align:center;}
div{width:300px;height:300px;position:relative;}
span{position:absolute;left:0;top:0;width:300px;height:20px;font-size:14px;line-height:20px;background:#000;opacity:0.5;color:#fff;text-align: center;}
div p{position:absolute;left:0;bottom:0;width:300px;height:20px;font-size:14px;line-height:20px;text-align: center;color:#fff;background:#000;opacity:0.5;}
div input{position:absolute;width:60px;height:60px;top:100px;background:pink;}
#back{left:0;}
#next{right:0;}
</style>
<script type="text/javascript">
window.onload=function(){
//循环切换
var oNext=document.getElementById("next");
var oBack=document.getElementById("back");
var oImg=document.getElementById("img");
var oText=document.getElementById("text");
var oSpan=document.getElementById("span");
var oLoop=document.getElementById("loop");
var Oorder=document.getElementById('order');
var oText1=document.getElementById("text1");
var aImg=["img/1.jpg","img/2.jpg","img/3.jpg","img/4.jpg"];
var aText=["图片1","图片2","图片3","图片4"];
var num=0;
//点击下一张事件
function next(){
num=num+1; //每次加一
//进行判断，如果num大于最后一张时,图片返回第一张
//// 1 2 3 4
if(num>aImg.length-1){
num=0;
}
oImg.src=aImg[num];
oText.innerHTML=aText[num];//图片信息变化，与数组关联
oSpan.innerHTML=(num+1)+"/"+aImg.length;//数量变化，与数组关联
//alert(num);
}
function back(){
num=num-1;
//进行判断，如果图片小于第一张时,图片返回最后一张
if(num<0){
num=aImg.length-1;
}
oImg.src=aImg[num];
oText.innerHTML=aText[num];//图片信息变化，与数组关联
oSpan.innerHTML=(num+1)+"/"+aImg.length;//数量变化，与数组关联
}
function next1(){
num=num+1; //每次加一
//进行判断，如果num大于最后一张时,弹出警告并把图片定在最后一张
//// 1 2 3 4
if(num>aImg.length-1){
num=aImg.length-1;
alert("最后一张了");
}
oImg.src=aImg[num];
oText.innerHTML=aText[num];
oSpan.innerHTML=num+1+"/"+aImg.length;
//alert(num);
}
function back1(){
num=num-1;
//进行判断，如果图片小于第一张时，弹出警告并把图片定在第一张
if(num<0){
num=0;
alert("已经是第一张了");
}
oImg.src=aImg[num];
oText.innerHTML=aText[num];
oSpan.innerHTML=num+1+"/"+aImg.length;
}
oNext.onclick=next;
oBack.onclick=back;
oLoop.onclick=function(){
oText1.innerHTML="图片可以从第一张到最后一张循环切换";
oNext.onclick=next;
oBack.onclick=back;
}
Oorder.onclick=function(){
oText1.innerHTML="图片只能从第一张到最后一张顺序切换";
oNext.onclick=next1;
oBack.onclick=back1;
}
}
</script>
</head>
<body>
<input id="loop" type="button" name="" value="循环切换"/>
<input id="order"type="button" name="" value="顺序切换"/>
<p id="text1">图片可以从第一张到最后一张循环切换</p>
<div>
<input id="back" type="button" name="" value="上一张"/>
<input id="next" type="button" name="" value="下一张"/>
<img id="img" src="img/1.jpg"/>
<span id="span">1/4</span>
<p id="text">图片1</p>
</div>
</body>
</html>
Picture switching means switching between two pictures in turn code:
<html lang="en">
<head>
<meta charset="utf-8">
<style>
#text{width:200px;height:200px;font-size:40px;line-height:40px;text-align: center;}
img{width:200px;height:200px;}
</style>
<script type="text/javascript">
window.onload=function(){
var oBtn=document.getElementById("btn");
var oImg=document.getElementById("img");
var oText=document.getElementById("text");
var onOff=true;
oBtn.onclick=function(){
if(onOff){
oImg.src="img/7.jpg";
oText.innerHTML="图片2";
onOff=false;
}
else{
oImg.src="img/5.jpg";
oText.innerHTML="图片1";
onOff=true;
}
}
}
</script>
</head>
<body>
<input id="btn" type="button" name="" value="切换图片"/>
<img id="img" src="img/5.jpg"/>
<p id="text">图片1</p>
</body>
</html>The above is the entire content of this article. I hope it will be helpful to everyone in learning javascript programming.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1376
52
Replace String Characters in JavaScript
Mar 11, 2025 am 12:07 AM
Detailed explanation of JavaScript string replacement method and FAQ This article will explore two ways to replace string characters in JavaScript: internal JavaScript code and internal HTML for web pages. Replace string inside JavaScript code The most direct way is to use the replace() method: str = str.replace("find","replace"); This method replaces only the first match. To replace all matches, use a regular expression and add the global flag g: str = str.replace(/fi
How do I create and publish my own JavaScript libraries?
Mar 18, 2025 pm 03:12 PM
Article discusses creating, publishing, and maintaining JavaScript libraries, focusing on planning, development, testing, documentation, and promotion strategies.
How do I optimize JavaScript code for performance in the browser?
Mar 18, 2025 pm 03:14 PM
The article discusses strategies for optimizing JavaScript performance in browsers, focusing on reducing execution time and minimizing impact on page load speed.
How do I debug JavaScript code effectively using browser developer tools?
Mar 18, 2025 pm 03:16 PM
The article discusses effective JavaScript debugging using browser developer tools, focusing on setting breakpoints, using the console, and analyzing performance.
10 Ways to Instantly Increase Your jQuery Performance
Mar 11, 2025 am 12:15 AM
This article outlines ten simple steps to significantly boost your script's performance. These techniques are straightforward and applicable to all skill levels. Stay Updated: Utilize a package manager like NPM with a bundler such as Vite to ensure
Using Passport With Sequelize and MySQL
Mar 11, 2025 am 11:04 AM
Sequelize is a promise-based Node.js ORM. It can be used with PostgreSQL, MySQL, MariaDB, SQLite, and MSSQL. In this tutorial, we will be implementing authentication for users of a web app. And we will use Passport, the popular authentication middlew
How to Build a Simple jQuery Slider
Mar 11, 2025 am 12:19 AM
This article will guide you to create a simple picture carousel using the jQuery library. We will use the bxSlider library, which is built on jQuery and provides many configuration options to set up the carousel. Nowadays, picture carousel has become a must-have feature on the website - one picture is better than a thousand words! After deciding to use the picture carousel, the next question is how to create it. First, you need to collect high-quality, high-resolution pictures. Next, you need to create a picture carousel using HTML and some JavaScript code. There are many libraries on the web that can help you create carousels in different ways. We will use the open source bxSlider library. The bxSlider library supports responsive design, so the carousel built with this library can be adapted to any
How do I use source maps to debug minified JavaScript code?
Mar 18, 2025 pm 03:17 PM
The article explains how to use source maps to debug minified JavaScript by mapping it back to the original code. It discusses enabling source maps, setting breakpoints, and using tools like Chrome DevTools and Webpack.
