<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Enter the title of your XHTML document here</title>
<script type="text/javascript">
function getCode()
{
var code="";
var codeLength = 4;//验证码的长度
var checkCode = document.getElementById("code");
checkCode.innerText = "";
var selectChar = new Array(0,1,2,3,4,5,6,7,8,9,'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];
}
checkCode.innerText = code;
}
</script>
</head>
<body onload="getCode()">
<p>Enter the body text of your XHTML document here</p>
验证码：<span id="code" style="color: red"></span> <span onclick="getCode()" style="cursor: hand">看不清点我</span>
</body>
</html>
