<!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title></title> <style> </style> </head> <body> <div> <h1>111111</h1><a href="#" rel="external nofollow" >看不清换一张</a> </div> 验证码：<input type="text" value="" /> <button>确定</button> </body> <script> var arr = ["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", 0,1,2,3,4,5,6,7,8,9]; var h1=document.querySelector("h1"); var btn=document.querySelector("button"); var change=document.querySelector("a"); var input=document.querySelector("input"); function fn(){ var arr1=Math.floor(Math.random()*62); var arr2=Math.floor(Math.random()*62); var arr3=Math.floor(Math.random()*62); var arr4=Math.floor(Math.random()*62); var arr5=Math.floor(Math.random()*62); var arr6=Math.floor(Math.random()*62); var yz=""+arr[arr1]+arr[arr2]+arr[arr3]+arr[arr4]+arr[arr5]+arr[arr6]; h1.innerHTML=yz; btn.onclick=function(){ alert(input.value); if(input.value==yz){ alert("正确"); }else{ alert("错误"); } } } fn(); change.addEventListener("click",fn); </script></html>
