第一种验证码
b.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE">
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
<title>设置-个人信息</title>
</head>
<body>
</body>
<script type="text/javascript" src="jquery.min.js" ></script>
<script type="text/javascript" src="a.js" ></script>
<div class="code">
<input type="text" value="" placeholder="请输入验证码（不区分大小写）" class="input-val">
<canvas id="canvas" width="100" height="30"></canvas>
<button class="btn">提交</button>
</div>
</html>a.js
$(function(){
var show_num = [];
draw(show_num);
$("#canvas").on('click',function(){
draw(show_num);
})
$(".btn").on('click',function(){
var val = $(".input-val").val().toLowerCase();
var num = show_num.join("");
if(val==''){
alert('请输入验证码！');
}else if(val == num){
alert('提交成功！');
$(".input-val").val('');
// draw(show_num);
}else{
alert('验证码错误！请重新输入！');
$(".input-val").val('');
// draw(show_num);
}
})
})
//生成并渲染出验证码图形
function draw(show_num) {
var canvas_width=$('#canvas').width();
var canvas_height=$('#canvas').height();
var canvas = document.getElementById("canvas");//获取到canvas的对象，演员
var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
canvas.width = canvas_width;
canvas.height = canvas_height;
var sCode = "a,b,c,d,e,f,g,h,i,j,k,m,n,p,q,r,s,t,u,v,w,x,y,z,A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
var aCode = sCode.split(",");
var aLength = aCode.length;//获取到数组的长度
for (var i = 0; i < 4; i++) { //这里的for循环可以控制验证码位数（如果想显示6位数，4改成6即可）
var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
// var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度
var deg = Math.random() - 0.5; //产生一个随机弧度
var txt = aCode[j];//得到随机的一个内容
show_num[i] = txt.toLowerCase();
var x = 10 + i * 20;//文字在canvas上的x坐标
var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
context.font = "bold 23px 微软雅黑";
context.translate(x, y);
context.rotate(deg);
context.fillStyle = randomColor();
context.fillText(txt, 0, 0);
context.rotate(-deg);
context.translate(-x, -y);
}
for (var i = 0; i <= 5; i++) { //验证码上显示线条
context.strokeStyle = randomColor();
context.beginPath();
context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
context.stroke();
}
for (var i = 0; i <= 30; i++) { //验证码上显示小点
context.strokeStyle = randomColor();
context.beginPath();
var x = Math.random() * canvas_width;
var y = Math.random() * canvas_height;
context.moveTo(x, y);
context.lineTo(x + 1, y + 1);
context.stroke();
}
}
//得到随机的颜色值
function randomColor() {
var r = Math.floor(Math.random() * 256);
var g = Math.floor(Math.random() * 256);
var b = Math.floor(Math.random() * 256);
return "rgb(" + r + "," + g + "," + b + ")";
}
jquery.min.js自己搞吧
第二种验证
index.html
<!DOCTYPE html>
<html>
<head>
<title>jQuery拖动滑块验证码代码</title>
<meta charset="utf-8">
<link href="css/drag.css" rel="stylesheet" type="text/css">
<script src="js/jquery-1.7.2.min.js" type="text/javascript"></script>
<script src="js/drag.js" type="text/javascript"></script>
</head>
<body>
<center><br><br><br><div id="drag"></div></center>
<script type="text/javascript">
$('#drag').drag();
</script>
<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
</div>
</body>
</html>js/drag.js
/*
* drag 1.0
* create by tony@jentian.com
* date 2015-08-18
* 拖动滑块
*/
(function($){
$.fn.drag = function(options){
var x, drag = this, isMove = false, defaults = {
};
var options = $.extend(defaults, options);
//添加背景，文字，滑块
var html = '<div class="drag_bg"></div>'+
'<div class="drag_text" onselectstart="return false;" unselectable="on">拖动滑块验证</div>'+
'<div class="handler handler_bg"></div>';
this.append(html);
var handler = drag.find('.handler');
var drag_bg = drag.find('.drag_bg');
var text = drag.find('.drag_text');
var maxWidth = drag.width() - handler.width(); //能滑动的最大间距
//鼠标按下时候的x轴的位置
handler.mousedown(function(e){
isMove = true;
x = e.pageX - parseInt(handler.css('left'), 10);
});
//鼠标指针在上下文移动时，移动距离大于0小于最大间距，滑块x轴位置等于鼠标移动距离
$(document).mousemove(function(e){
var _x = e.pageX - x;
if(isMove){
if(_x > 0 && _x <= maxWidth){
handler.css({'left': _x});
drag_bg.css({'width': _x});
}else if(_x > maxWidth){ //鼠标指针移动距离达到最大时清空事件
dragOk();
}
}
}).mouseup(function(e){
isMove = false;
var _x = e.pageX - x;
if(_x < maxWidth){ //鼠标松开时，如果没有达到最大距离位置，滑块就返回初始位置
handler.css({'left': 0});
drag_bg.css({'width': 0});
}
});
//清空事件
function dragOk(){
handler.removeClass('handler_bg').addClass('handler_ok_bg');
text.text('验证通过');
drag.css({'color': '#fff'});
handler.unbind('mousedown');
$(document).unbind('mousemove');
$(document).unbind('mouseup');
}
};
})(jQuery);
js/ jquery-1.7.2.min.js自己搞把
css/drag.css
#drag{
position: relative;
background-color: #e8e8e8;
300px;
height: 34px;
line-height: 34px;
text-align: center;
}
#drag .handler{
position: absolute;
top: 0px;
left: 0px;
40px;
height: 32px;
border: 1px solid #ccc;
cursor: move;
}
.handler_bg{
background: #fff url("data:image/png;base64,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") no-repeat center;
}
.handler_ok_bg{
background: #fff url("data:image/png;base64,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") no-repeat center;
}
#drag .drag_bg{
background-color: #7ac23c;
height: 34px;
0px;
}
#drag .drag_text{
position: absolute;
top: 0px;
300px;
-moz-user-select: none;
-webkit-user-select: none;
user-select: none;
-o-user-select:none;
-ms-user-select:none;
}第三种验证
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>滑动拼图验证码</title>
<link rel="stylesheet" href="jigsaw.css">
<style>
.container {
310px;
margin: 100px auto;
}
input {
display: block;
290px;
line-height: 40px;
margin: 10px 0;
padding: 0 10px;
outline: none;
border:1px solid #c8cccf;
border-radius: 4px;
color:#6a6f77;
}
#msg {
100%;
line-height: 40px;
font-size: 14px;
text-align: center;
}
a:link,a:visited,a:hover,a:active {
margin-left: 100px;
color: #0366D6;
}
</style>
</head>
<body>
<div class="container">
<input value="admin" readonly/>
<input type="password" value="1234567890" readonly/>
<div id="captcha" style="position: relative"></div>
<div id="msg"></div>
</div>
<script src="jigsaw.js"></script>
<script>
jigsaw.init(document.getElementById('captcha'), function () {
document.getElementById('msg').innerHTML = '登录成功！'
})
</script>
</body>
</html>
jigsaw.css
.block {
position: absolute;
left: 0;
top: 0;
}
.sliderContainer {
position: relative;
text-align: center;
310px;
height: 40px;
line-height: 40px;
margin-top: 15px;
background: #f7f9fa;
color: #45494c;
border: 1px solid #e4e7eb;
}
.sliderContainer_active .slider {
height: 38px;
top: -1px;
border: 1px solid #1991FA;
}
.sliderContainer_active .sliderMask {
height: 38px;
border- 1px;
}
.sliderContainer_success .slider {
height: 38px;
top: -1px;
border: 1px solid #52CCBA;
background-color: #52CCBA !important;
}
.sliderContainer_success .sliderMask {
height: 38px;
border: 1px solid #52CCBA;
background-color: #D2F4EF;
}
.sliderContainer_success .sliderIcon {
background-position: 0 0 !important;
}
.sliderContainer_fail .slider {
height: 38px;
top: -1px;
border: 1px solid #f57a7a;
background-color: #f57a7a !important;
}
.sliderContainer_fail .sliderMask {
height: 38px;
border: 1px solid #f57a7a;
background-color: #fce1e1;
}
.sliderContainer_fail .sliderIcon {
background-position: 0 -83px !important;
}
.sliderContainer_active .sliderText, .sliderContainer_success .sliderText, .sliderContainer_fail .sliderText {
display: none;
}
.sliderMask {
position: absolute;
left: 0;
top: 0;
height: 40px;
border: 0 solid #1991FA;
background: #D1E9FE;
}
.slider {
position: absolute;
top: 0;
left: 0;
40px;
height: 40px;
background: #fff;
box-shadow: 0 0 3px rgba(0, 0, 0, 0.3);
cursor: pointer;
transition: background .2s linear;
}
.slider:hover {
background: #1991FA;
}
.slider:hover .sliderIcon {
background-position: 0 -13px;
}
.sliderIcon {
position: absolute;
top: 15px;
left: 13px;
14px;
height: 10px;
background: url(http://cstaticdun.126.net//2.6.3/images/icon_light.f13cff3.png) 0 -26px;
background-size: 34px 471px;
}
.refreshIcon {
position: absolute;
right: 0;
top: 0;
34px;
height: 34px;
cursor: pointer;
background: url(http://cstaticdun.126.net//2.6.3/images/icon_light.f13cff3.png) 0 -437px;
background-size: 34px 471px;
}
jigsaw.js
(function (window) {
const l = 42, // 滑块边长
r = 10, // 滑块半径
w = 310, // canvas宽度
h = 155, // canvas高度
PI = Math.PI
const L = l + r * 2 // 滑块实际边长
function getRandomNumberByRange(start, end) {
return Math.round(Math.random() * (end - start) + start)
}
function createCanvas(width, height) {
const canvas = createElement('canvas')
canvas.width = width
canvas.height = height
return canvas
}
function createImg(onload) {
const img = createElement('img')
img.crossOrigin = "Anonymous"
img.onload = onload
img.onerror = () => {
img.src = getRandomImg()
}
img.src = getRandomImg()
return img
}
function createElement(tagName) {
return document.createElement(tagName)
}
function addClass(tag, className) {
tag.classList.add(className)
}
function removeClass(tag, className) {
tag.classList.remove(className)
}
function getRandomImg() {
return 'https://picsum.photos/300/150/?image=' + getRandomNumberByRange(0, 100)
}
function draw(ctx, operation, x, y) {
ctx.beginPath()
ctx.moveTo(x, y)
ctx.lineTo(x + l / 2, y)
ctx.arc(x + l / 2, y - r + 2, r, 0, 2 * PI)
ctx.lineTo(x + l / 2, y)
ctx.lineTo(x + l, y)
ctx.lineTo(x + l, y + l / 2)
ctx.arc(x + l + r - 2, y + l / 2, r, 0, 2 * PI)
ctx.lineTo(x + l, y + l / 2)
ctx.lineTo(x + l, y + l)
ctx.lineTo(x, y + l)
ctx.lineTo(x, y)
ctx.fillStyle = '#fff'
ctx[operation]()
ctx.beginPath()
ctx.arc(x, y + l / 2, r, 1.5 * PI, 0.5 * PI)
ctx.globalCompositeOperation = "xor"
ctx.fill()
}
function sum(x, y) {
return x + y
}
function square(x) {
return x * x
}
class jigsaw {
constructor(el, success, fail) {
this.el = el
this.success = success
this.fail = fail
}
init() {
this.initDOM()
this.initImg()
this.draw()
this.bindEvents()
}
initDOM() {
const canvas = createCanvas(w, h) // 画布
const block = canvas.cloneNode(true) // 滑块
const sliderContainer = createElement('div')
const refreshIcon = createElement('div')
const sliderMask = createElement('div')
const slider = createElement('div')
const sliderIcon = createElement('span')
const text = createElement('span')
block.className = 'block'
sliderContainer.className = 'sliderContainer'
refreshIcon.className = 'refreshIcon'
sliderMask.className = 'sliderMask'
slider.className = 'slider'
sliderIcon.className = 'sliderIcon'
text.innerHTML = '向右滑动滑块填充拼图'
text.className = 'sliderText'
const el = this.el
el.appendChild(canvas)
el.appendChild(refreshIcon)
el.appendChild(block)
slider.appendChild(sliderIcon)
sliderMask.appendChild(slider)
sliderContainer.appendChild(sliderMask)
sliderContainer.appendChild(text)
el.appendChild(sliderContainer)
Object.assign(this, {
canvas,
block,
sliderContainer,
refreshIcon,
slider,
sliderMask,
sliderIcon,
text,
canvasCtx: canvas.getContext('2d'),
blockCtx: block.getContext('2d')
})
}
initImg() {
const img = createImg(() => {
this.canvasCtx.drawImage(img, 0, 0, w, h)
this.blockCtx.drawImage(img, 0, 0, w, h)
const y = this.y - r * 2 + 2
const ImageData = this.blockCtx.getImageData(this.x, y, L, L)
this.block.width = L
this.blockCtx.putImageData(ImageData, 0, y)
})
this.img = img
}
draw() {
// 随机创建滑块的位置
this.x = getRandomNumberByRange(L + 10, w - (L + 10))
this.y = getRandomNumberByRange(10 + r * 2, h - (L + 10))
draw(this.canvasCtx, 'fill', this.x, this.y)
draw(this.blockCtx, 'clip', this.x, this.y)
}
clean() {
this.canvasCtx.clearRect(0, 0, w, h)
this.blockCtx.clearRect(0, 0, w, h)
this.block.width = w
}
bindEvents() {
this.el.onselectstart = () => false
this.refreshIcon.onclick = () => {
this.reset()
}
let originX, originY, trail = [], isMouseDown = false
this.slider.addEventListener('mousedown', function (e) {
originX = e.x, originY = e.y
isMouseDown = true
})
document.addEventListener('mousemove', (e) => {
if (!isMouseDown) return false
const moveX = e.x - originX
const moveY = e.y - originY
if (moveX < 0 || moveX + 38 >= w) return false
this.slider.style.left = moveX + 'px'
var blockLeft = (w - 40 - 20) / (w - 40) * moveX
this.block.style.left = blockLeft + 'px'
addClass(this.sliderContainer, 'sliderContainer_active')
this.sliderMask.style.width = moveX + 'px'
trail.push(moveY)
})
document.addEventListener('mouseup', (e) => {
if (!isMouseDown) return false
isMouseDown = false
if (e.x == originX) return false
removeClass(this.sliderContainer, 'sliderContainer_active')
this.trail = trail
const {spliced, TuringTest} = this.verify()
if (spliced) {
if (TuringTest) {
addClass(this.sliderContainer, 'sliderContainer_success')
this.success && this.success()
} else {
addClass(this.sliderContainer, 'sliderContainer_fail')
this.text.innerHTML = '再试一次'
this.reset()
}
} else {
addClass(this.sliderContainer, 'sliderContainer_fail')
this.fail && this.fail()
setTimeout(() => {
this.reset()
}, 1000)
}
})
}
verify() {
const arr = this.trail // 拖动时y轴的移动距离
const average = arr.reduce(sum) / arr.length // 平均值
const deviations = arr.map(x => x - average) // 偏差数组
const stddev = Math.sqrt(deviations.map(square).reduce(sum) / arr.length) // 标准差
const left = parseInt(this.block.style.left)
return {
spliced: Math.abs(left - this.x) < 10,
TuringTest: average !== stddev, // 只是简单的验证拖动轨迹，相等时一般为0，表示可能非人为操作
}
}
reset() {
this.sliderContainer.className = 'sliderContainer'
this.slider.style.left = 0
this.block.style.left = 0
this.sliderMask.style.width = 0
this.clean()
this.img.src = getRandomImg()
this.draw()
}
}
window.jigsaw = {
init: function (element, success, fail) {
new jigsaw(element, success, fail).init()
}
}
}(window))