<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www./TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www./1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>无标题文档</title> <style type="text/css">.code{background-image:url(111.jpg);font-family:Arial,宋体;font-style:italic;color:green;border:0;padding:2px 3px;letter-spacing:3px;font-weight:bolder;}.unchanged {border:0;} </style> <script language="javascript" type="text/javascript"> var code ; //在全局 定义验证码 function createCode(){ code = new Array(); var codeLength = 4;//验证码的长度 var checkCode = document.getElementById("checkCode"); checkCode.value = ""; var selectChar = new Array(2,3,4,5,6,7,8,9,'A','B','C','D','E','F','G','H','J','K','L','M','N','P','Q','R','S','T','U','V','W','X','Y','Z');
for(var i=0;i<codeLength;i++) { var charIndex = Math.floor(Math.random()*32); code +=selectChar[charIndex]; } if(code.length != codeLength){ createCode(); } checkCode.value = code; } function validate () { var inputCode = document.getElementById("input1").value.toUpperCase(); if(inputCode.length <=0) { alert("请输入验证码!"); return false;}else if( inputCode != code ){ alert("验证码输入错误!"); createCode(); return false;}else { alert("成功!"); return true;}}</script> </head>
<body onLoad="createCode();"> <input type="text" id="input1" /><input type="button" id="checkCode" class="code" style="width:60px" onClick="createCode()" /> <a href="#" onClick="createCode()">看不清楚</a> <input id="Button1" onClick="validate();" type="button" value="确定" />
</body> </html>
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