<html>
<head>
<style type="text/css">
.code {
background-image: url(code.jpg);
font-family: Arial;
font-style: italic;
color: Red;
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 = "";
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("OK");
return true;
}
}
</script>
</head>
<body onload="createCode();">
<input type="text" id="input1" />
<input type="text" id="checkCode" class="code" style="width: 55px" />
<a href="#" onclick="createCode()">看不清楚</a>
<input id="Button1" onclick="validate();" type="button" value="确定" />
<script></script>
</body>
</html>
