jQuery点击输入框显示验证码图片_jquery
先看效果图：
要求：当输入框获得焦点时，自动显示验证图片。
代码如下（学习而已，仅供参考）：
/***********************下是验证码对象*****************/
var Validation = {};
Validation.init = function(eleName,imageSrc){
this.image = imageSrc;
$('#'+eleName).focusin(function(){
Validation.show(eleName);
});
}
Validation.image = '';
Validation.display=false;
Validation.width = '100px';
Validation.height = '30px';
Validation.div = null;
Validation.show = function(eleName){
if(this.display==false){
//首次显示
if(this.div==null){
$('#'+eleName).after('<div style="display:none;" id="div_validation_'+eleName+'" title="点击更换"></div>');
this.div = $('#div_validation_'+eleName);
this.div.css('position','absolute');
this.div.css('cursor','pointer');
this.div.css('border','1px solid #CCC');
this.div.css('background-color','#FFF');
this.div.css('background-position','center');
this.div.css('background-repeat','no-repeat');
this.div.css('height',this.height);
this.div.css('width',this.width);
var objOffset = $('#'+eleName).offset();
objOffset.top+=$('#'+eleName).height()+6;
this.div.offset(objOffset);
this.div.css('background-image','url('+Validation.image+'&_t='+new Date()+')');
this.div.css('display','inline-block');
this.display = true;
//点击更换
this.div.click(function(){
Validation.div.css('background-image','url('+Validation.image+'&_t='+new Date()+')');
});
}
else{
this.div.css('background-image','url('+Validation.image+'&_t='+new Date()+')');
this.display = true;
this.div.css('display','inline-block');
}
}
}
Validation.hide =function(){
if(this.display==true){
this.display = false;
this.div.hide();
}
}
使用方式：
//验证码对象初始化
Validation.init('validation','Ajax.ashx?handle=validation');
// 输入框ID 验证图片地址
//隐藏
Validation.hide();
以上就是本文的全部内容，希望对大家的学习有所帮助。
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
What should I do if I encounter garbled code printing for front-end thermal paper receipts?
Apr 04, 2025 pm 02:42 PM
Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...
Demystifying JavaScript: What It Does and Why It Matters
Apr 09, 2025 am 12:07 AM
JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.
Who gets paid more Python or JavaScript?
Apr 04, 2025 am 12:09 AM
There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.
How to merge array elements with the same ID into one object using JavaScript?
Apr 04, 2025 pm 05:09 PM
How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...
Is JavaScript hard to learn?
Apr 03, 2025 am 12:20 AM
Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.
How to achieve parallax scrolling and element animation effects, like Shiseido's official website?
or:
How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website?
Apr 04, 2025 pm 05:36 PM
Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...
The difference in console.log output result: Why are the two calls different?
Apr 04, 2025 pm 05:12 PM
In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...
How to implement panel drag and drop adjustment function similar to VSCode in front-end development?
Apr 04, 2025 pm 02:06 PM
Explore the implementation of panel drag and drop adjustment function similar to VSCode in the front-end. In front-end development, how to implement VSCode similar to VSCode...
