<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>验证码</title>
</head>
<style>
#txt{
width:120px;
height:40px;
border:1px solid #aaa;
margin-top: 20px;
}
</style>
<body>
<button id="btn">获得验证码</button>
<div class="txt" id="txt"></div>
</body>
<script src="js/jquery-1.4.2.min.js"></script>
<script>
window.onload = function(){
var oBtn = document.querySelector('#btn');
var oTxt = document.querySelector('#txt');
//生成随机数
function rund(n,m){
return Math.floor(Math.random()*(m-n)+n);
}
//去除数组相同的数字
function findArr(n,arr){
for(var i=0;i<arr.length;i++){
if(arr[i] == n){
return true;
}else{
return false;
}
}
}
oBtn.onclick = function(){
//每次单击实现一次
var num = [];
while(num.length < 6){
var m = rund(0,9);
if(!findArr(m,num)){
num.push(m);
}
}
var str = num.splice('')
num = str.join();
oTxt.innerHTML = num;
}
}
</script>
</html>
