Web Front-end
HTML Tutorial
Display the corresponding content through the drop-down box. _html/css_WEB-ITnose
Display the corresponding content through the drop-down box. _html/css_WEB-ITnose
比如，我有下拉框
<select name="select"> <option>--请选择--</option> <option value="1">显示内容1</option> <option value="2">显示内容2</option> <option value="3">显示内容3</option> </select>
比如我选择下拉框“显示内容1”，就在右边显示内容1相关的内容。。
比如我选择下拉框“显示内容2”，就在右边显示内容2相关的内容。。
求html代码。。
回复讨论(解决方案)
右边 是什么
右边 是什么
右边就是显示的内容，随便是什么都可以。
非常感谢。
<!DOCTYPE html><html><head><script>function changeValue(e){if(e.selectedIndex!=0){document.getElementById("showValue").value=e.options[e.selectedIndex].text;}else{document.getElementById("showValue").value='';}}</script></head><body><select name="select" onchange="changeValue(this)"> <option>--请选择--</option> <option value="1">显示内容1</option> <option value="2">显示内容2</option> <option value="3">显示内容3</option> </select><input type="text" id="showValue" /></body></html>
如果要设置一个默认显示内容怎么办，比如什么都不选择的时候。。。
显示content0
比如默认请选择的情况下，下面显示一个默认的内容。？
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
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
1387
52
Is HTML easy to learn for beginners?
Apr 07, 2025 am 12:11 AM
HTML is suitable for beginners because it is simple and easy to learn and can quickly see results. 1) The learning curve of HTML is smooth and easy to get started. 2) Just master the basic tags to start creating web pages. 3) High flexibility and can be used in combination with CSS and JavaScript. 4) Rich learning resources and modern tools support the learning process.
What is the purpose of the <progress> element?
Mar 21, 2025 pm 12:34 PM
The article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati
The Roles of HTML, CSS, and JavaScript: Core Responsibilities
Apr 08, 2025 pm 07:05 PM
HTML defines the web structure, CSS is responsible for style and layout, and JavaScript gives dynamic interaction. The three perform their duties in web development and jointly build a colorful website.
What is the purpose of the <datalist> element?
Mar 21, 2025 pm 12:33 PM
The article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159
What is the purpose of the <meter> element?
Mar 21, 2025 pm 12:35 PM
The article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex
Understanding HTML, CSS, and JavaScript: A Beginner's Guide
Apr 12, 2025 am 12:02 AM
WebdevelopmentreliesonHTML,CSS,andJavaScript:1)HTMLstructurescontent,2)CSSstylesit,and3)JavaScriptaddsinteractivity,formingthebasisofmodernwebexperiences.
What is an example of a starting tag in HTML?
Apr 06, 2025 am 12:04 AM
AnexampleofastartingtaginHTMLis,whichbeginsaparagraph.StartingtagsareessentialinHTMLastheyinitiateelements,definetheirtypes,andarecrucialforstructuringwebpagesandconstructingtheDOM.
Gitee Pages static website deployment failed: How to troubleshoot and resolve single file 404 errors?
Apr 04, 2025 pm 11:54 PM
GiteePages static website deployment failed: 404 error troubleshooting and resolution when using Gitee...
