Need to introduce jq package
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>登录界面</title>
<!-- 需要引用JQuery -->
<script type="text/javascript" src="./js/jquery-1.11.0.js"></script>
<style>
#bg{
margin:0px;
background:
url(img/timg.jpg) no-repeat;
background-size:100% 100%;
background-attachment:fixed;
}
#f1{
font-size: 100px;
line-height: 150px;
text-shadow:8px 8px 5px #62a8ea;
font-family:STXingkai
}
#tb{
background-color: aliceblue;
width: 25%;
height: 300px;
margin: 0 auto;
}
h2{
text-align: center;
color: #62a8ea;
letter-spacing: 10px;
}
form{
border: 3px solid aliceblue;
width: 80%;
margin: 0 auto;
}
.t{
border: 1px solid white;
/* display: inline-block; */
box-sizing: border-box;
width: 100%;
height: 35px;
padding-left: 10px;
font-size: 14px;
outline: none;
color: #76838f;
}
#login{
background-color: #62a8ea;
color: #ffffff;
font-size: 16px;
width: 100%;
height: 40px;
border: 1px solid #62a8ea;
border-radius: 4px;
}
</style>
</head>
<body id="bg">
<div>
<div align="center">
<h2>
<font color="aliceblue" id="f1"><strong>登 录</strong></font>
</h2>
</div>
<div>&nbst</div>
<div>
<table id="tb">
<tr>
<td>
<h2>用户登陆</h2>
<hr />
</td>
</tr>
<tr>
<td>
<form action="" method="get" id="userinfo">
<strong>用户名</strong>:<br />
<input type="text" name="username" class="t" placeholder="请输入用户名" /><br />
<strong>密码</strong>:<br />
<input type="password" name="pwd" class="t" placeholder="请输入密码" /><br />
验证码:<br />
<div style="float: left;width: 50%;"><input type="text" id="code_input" class="t" value="" placeholder="请输入验证码"/></div>
<div id="v_container" style="width: 50%;height: 35px;float: left;"></div>
<br /><br />
<script>
!(function(window, document) {
function GVerify(options) {
//创建一个图形验证码对象，接收options对象为参数
this.options = {
//默认options参数值
id: "", //容器Id
canvasId: "verifyCanvas", //canvas的ID
width: "100", //默认canvas宽度
height: "30", //默认canvas高度
type: "blend", //图形验证码默认类型blend:数字字母混合类型、number:纯数字、letter:纯字母
code: ""
}
if(Object.prototype.toString.call(options) == "[object Object]"){
//判断传入参数类型
for(var i in options) {
//根据传入的参数，修改默认参数值
this.options[i] = options[i];
}
}else{
this.options.id = options;
}
this.options.numArr = "0,1,2,3,4,5,6,7,8,9".split(",");
this.options.letterArr = getAllLetter();
this._init();
this.refresh();
}
GVerify.prototype = {
/**版本号**/
version: '1.0.0',
/**初始化方法**/
_init: function() {
var con = document.getElementById(this.options.id);
var canvas = document.createElement("canvas");
this.options.width = con.offsetWidth > 0 ? con.offsetWidth : "100";
this.options.height = con.offsetHeight > 0 ? con.offsetHeight : "30";
canvas.id = this.options.canvasId;
canvas.width = this.options.width;
canvas.height = this.options.height;
canvas.style.cursor = "pointer";
canvas.innerHTML = "您的浏览器版本不支持canvas";
con.appendChild(canvas);
var parent = this;
canvas.onclick = function(){
parent.refresh();
}
},
/**生成验证码**/
refresh: function() {
this.options.code = "";
var canvas = document.getElementById(this.options.canvasId);
if(canvas.getContext) {
var ctx = canvas.getContext('2d');
}else{
return;
}
ctx.textBaseline = "middle";
ctx.fillStyle = randomColor(180, 240);
ctx.fillRect(0, 0, this.options.width, this.options.height);
if(this.options.type == "blend") {
//判断验证码类型
var txtArr = this.options.numArr.concat(this.options.letterArr);
} else if(this.options.type == "number") {
var txtArr = this.options.numArr;
} else {
var txtArr = this.options.letterArr;
}
for(var i = 1; i <= 4; i++) {
var txt = txtArr[randomNum(0, txtArr.length)];
this.options.code += txt;
ctx.font = randomNum(this.options.height/2, this.options.height) + 'px SimHei'; //随机生成字体大小
ctx.fillStyle = randomColor(50, 160); //随机生成字体颜色
ctx.shadowOffsetX = randomNum(-3, 3);
ctx.shadowOffsetY = randomNum(-3, 3);
ctx.shadowBlur = randomNum(-3, 3);
ctx.shadowColor = "rgba(0, 0, 0, 0.3)";
var x = this.options.width / 5 * i;
var y = this.options.height / 2;
var deg = randomNum(-30, 30);
/**设置旋转角度和坐标原点**/
ctx.translate(x, y);
ctx.rotate(deg * Math.PI / 180);
ctx.fillText(txt, 0, 0);
/**恢复旋转角度和坐标原点**/
ctx.rotate(-deg * Math.PI / 180);
ctx.translate(-x, -y);
}
/*绘制干扰线*/
for(var i = 0; i < 4; i++) {
ctx.strokeStyle = randomColor(40, 180);
ctx.beginPath();
ctx.moveTo(randomNum(0, this.options.width), randomNum(0, this.options.height));
ctx.lineTo(randomNum(0, this.options.width), randomNum(0, this.options.height));
ctx.stroke();
}
/**绘制干扰点**/
for(var i = 0; i < this.options.width/4; i++) {
ctx.fillStyle = randomColor(0, 255);
ctx.beginPath();
ctx.arc(randomNum(0, this.options.width), randomNum(0, this.options.height), 1, 0, 2 * Math.PI);
ctx.fill();
}
},
/**验证验证码**/
validate: function(code){
var code = code.toLowerCase();
var v_code = this.options.code.toLowerCase();
console.log(v_code);
if(code == v_code){
return true;
}else{
this.refresh();
return false;
}
}
}
/**生成字母数组**/
function getAllLetter() {
var letterStr = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z";
return letterStr.split(",");
}
/**生成一个随机数**/
function randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min);
}
/**生成一个随机色**/
function randomColor(min, max) {
var r = randomNum(min, max);
var g = randomNum(min, max);
var b = randomNum(min, max);
return "rgb(" + r + "," + g + "," + b + ")";
}
window.GVerify = GVerify;
})(window, document);
</script>
<script>
var verifyCode = new GVerify("v_container");
// document.getElementById("my_button").onclick = function(){
// var res = verifyCode.validate(document.getElementById("code_input").value);
// if(res){
// alert("验证正确");
// }else{
// alert("验证码错误");
// }
// }
$(function(){
$("#login").click(function(){
var res = verifyCode.validate(document.getElementById("code_input").value);
if(res){
$("#userinfo").submit();
}else{
alert("验证码错误");
}
});
});
</script>
<input type="button" value="登录" id="login" />
</form>
</td>
</tr>
<tr>
<td></td>
</tr>
</table>
</div>
</div>
</body>
</html>