Home Web Front-end JS Tutorial Implement checkbox checkbox example code based on javascript_javascript skills

Implement checkbox checkbox example code based on javascript_javascript skills

May 16, 2016 pm 03:17 PM
javascript checkbox

The example in this article explains the detailed code for implementing the checkbox in JavaScript and shares it with you for your reference. The specific content is as follows

Rendering:

Specific code:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<script type="text/javascript">
function select_all(obj)
{
  //取得由所有hobby构成的一个数组对象
  //如果表单中,存在多个同名的name,将产生一个数组
  var arr = document.form1.hobby;
  if(obj.checked)
  {
    //为true执行代码
    for(var i=0;i<arr.length;i++)
    {
      arr[i].checked = true;
    }
  }else
  {
    //为false执行代码
    for(var i=0;i<arr.length;i++)
    {
      arr[i].checked = false;
    }
  }
}
function select_no_all()
{
  //取得所有的hobby对象
  var arr = document.form1.hobby;
  for(var i=0;i<arr.length;i++)
  {
    if(arr[i].checked)
    {
      //如果选中,则取消
      arr[i].checked = false;
    }else
    {
      //如果没选中,则选中
      arr[i].checked = true;
    }
  }
}
</script>
</head>

<body>
<form name="form1">
<fieldset>
  <legend>选择你感兴趣的类别</legend>
  <input type="checkbox" name="hobby" value="音乐" />音乐
  <input type="checkbox" name="hobby" value="看书" />看书
  <input type="checkbox" name="hobby" value="体育" />体育
  <input type="checkbox" name="hobby" value="足球" />足球
  <input type="checkbox" name="hobby" value="电脑" />电脑<br />
  <input type="checkbox" name="hobby" value="小说" />小说
  <input type="checkbox" name="hobby" value="文学" />文学
  <input type="checkbox" name="hobby" value="动漫" />动漫
  <input type="checkbox" name="hobby" value="经济" />经济
  <input type="checkbox" name="hobby" value="电影" />电影<br />
  <input type="checkbox" name="hobby" value="美术" />美术
  <input type="checkbox" name="hobby" value="管理" />管理
  <input type="checkbox" name="hobby" value="历史" />历史
  <input type="checkbox" name="hobby" value="旅游" />旅游
  <input type="checkbox" name="hobby" value="戏剧" />戏剧
</fieldset>
  <input type="checkbox" onclick="select_all(this)" value="全选" />全选
  <input type="checkbox" onclick="select_no_all()" value="反选" />反选
</form>

</body>
</html>
Copy after login

I hope this article will be helpful to everyone learning JavaScript programming.

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to implement an online speech recognition system using WebSocket and JavaScript How to implement an online speech recognition system using WebSocket and JavaScript Dec 17, 2023 pm 02:54 PM

How to use WebSocket and JavaScript to implement an online speech recognition system Introduction: With the continuous development of technology, speech recognition technology has become an important part of the field of artificial intelligence. The online speech recognition system based on WebSocket and JavaScript has the characteristics of low latency, real-time and cross-platform, and has become a widely used solution. This article will introduce how to use WebSocket and JavaScript to implement an online speech recognition system.

WebSocket and JavaScript: key technologies for implementing real-time monitoring systems WebSocket and JavaScript: key technologies for implementing real-time monitoring systems Dec 17, 2023 pm 05:30 PM

WebSocket and JavaScript: Key technologies for realizing real-time monitoring systems Introduction: With the rapid development of Internet technology, real-time monitoring systems have been widely used in various fields. One of the key technologies to achieve real-time monitoring is the combination of WebSocket and JavaScript. This article will introduce the application of WebSocket and JavaScript in real-time monitoring systems, give code examples, and explain their implementation principles in detail. 1. WebSocket technology

How to implement an online reservation system using WebSocket and JavaScript How to implement an online reservation system using WebSocket and JavaScript Dec 17, 2023 am 09:39 AM

How to use WebSocket and JavaScript to implement an online reservation system. In today's digital era, more and more businesses and services need to provide online reservation functions. It is crucial to implement an efficient and real-time online reservation system. This article will introduce how to use WebSocket and JavaScript to implement an online reservation system, and provide specific code examples. 1. What is WebSocket? WebSocket is a full-duplex method on a single TCP connection.

Use jQuery to implement real-time updates of checkbox selected status Use jQuery to implement real-time updates of checkbox selected status Feb 23, 2024 pm 03:45 PM

Using jQuery to Real-time Update the Selected Status of Check Boxes In web development, we often encounter situations where we need to update the selected status of check boxes in real time. By using jQuery, we can easily implement the function of updating the selected status of the check box in real time. Here's how to use jQuery to accomplish this task. First, we need to prepare a simple HTML structure containing multiple checkboxes:

How to use JavaScript and WebSocket to implement a real-time online ordering system How to use JavaScript and WebSocket to implement a real-time online ordering system Dec 17, 2023 pm 12:09 PM

Introduction to how to use JavaScript and WebSocket to implement a real-time online ordering system: With the popularity of the Internet and the advancement of technology, more and more restaurants have begun to provide online ordering services. In order to implement a real-time online ordering system, we can use JavaScript and WebSocket technology. WebSocket is a full-duplex communication protocol based on the TCP protocol, which can realize real-time two-way communication between the client and the server. In the real-time online ordering system, when the user selects dishes and places an order

Simple JavaScript Tutorial: How to Get HTTP Status Code Simple JavaScript Tutorial: How to Get HTTP Status Code Jan 05, 2024 pm 06:08 PM

JavaScript tutorial: How to get HTTP status code, specific code examples are required. Preface: In web development, data interaction with the server is often involved. When communicating with the server, we often need to obtain the returned HTTP status code to determine whether the operation is successful, and perform corresponding processing based on different status codes. This article will teach you how to use JavaScript to obtain HTTP status codes and provide some practical code examples. Using XMLHttpRequest

JavaScript and WebSocket: Building an efficient real-time weather forecasting system JavaScript and WebSocket: Building an efficient real-time weather forecasting system Dec 17, 2023 pm 05:13 PM

JavaScript and WebSocket: Building an efficient real-time weather forecast system Introduction: Today, the accuracy of weather forecasts is of great significance to daily life and decision-making. As technology develops, we can provide more accurate and reliable weather forecasts by obtaining weather data in real time. In this article, we will learn how to use JavaScript and WebSocket technology to build an efficient real-time weather forecast system. This article will demonstrate the implementation process through specific code examples. We

How to get HTTP status code in JavaScript the easy way How to get HTTP status code in JavaScript the easy way Jan 05, 2024 pm 01:37 PM

Introduction to the method of obtaining HTTP status code in JavaScript: In front-end development, we often need to deal with the interaction with the back-end interface, and HTTP status code is a very important part of it. Understanding and obtaining HTTP status codes helps us better handle the data returned by the interface. This article will introduce how to use JavaScript to obtain HTTP status codes and provide specific code examples. 1. What is HTTP status code? HTTP status code means that when the browser initiates a request to the server, the service

See all articles