js 怎么不区分大小写
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<head>
<title>JS生成验证码</title>
<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");
var selectChar = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9,'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');//所有候选组成验证码的字符，当然也可以用中文的
for (var i = 0; i < codeLength; i++) {
var charIndex = Math.floor(Math.random() * 36);
code += selectChar[charIndex];
}
//alert(code);
if (checkCode) {
checkCode.className = "code";
checkCode.value = code;
}
}
function validate() {
var inputCode = document.getElementById("input1").value;
if (inputCode.length <= 0) {
alert("请输入验证码！");
} else if (inputCode != code) {
alert("验证码输入错误！");
createCode();//刷新验证码
}
else {
alert("^-^ OK");
}
}
</script>
</head>
<body
onload="createCode()">
<form action="#">
<input type="text" id="input1" /> <input type="text" onclick="create()" readonly="readonly" id="checkCode" class="unchanged" style="width: 80px" /><br />
<input id="Button1" onclick="validate();" type="button" value="确定" />
</form>
</body>
</html>
<input type="text" id="phone" name="phone"/>
</div>
<div>
<font color="red">*</font>验证码：
</div>
<div>
<input type="text" id="checkCode" name="checkCode" size="4"/>
<input id="btnSendCode" type="button" value="发送验证码" onclick="sendMessage()" />
</div>
</form>
</body> 展开
<META http-equiv=Content-Type content="text/html; charset=gb2312">
<head>
<title>JS生成验证码</title>
<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");
var selectChar = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9,'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');//所有候选组成验证码的字符，当然也可以用中文的
for (var i = 0; i < codeLength; i++) {
var charIndex = Math.floor(Math.random() * 36);
code += selectChar[charIndex];
}
//alert(code);
if (checkCode) {
checkCode.className = "code";
checkCode.value = code;
}
}
function validate() {
var inputCode = document.getElementById("input1").value;
if (inputCode.length <= 0) {
alert("请输入验证码！");
} else if (inputCode != code) {
alert("验证码输入错误！");
createCode();//刷新验证码
}
else {
alert("^-^ OK");
}
}
</script>
</head>
<body
onload="createCode()">
<form action="#">
<input type="text" id="input1" /> <input type="text" onclick="create()" readonly="readonly" id="checkCode" class="unchanged" style="width: 80px" /><br />
<input id="Button1" onclick="validate();" type="button" value="确定" />
</form>
</body>
</html>
<input type="text" id="phone" name="phone"/>
</div>
<div>
<font color="red">*</font>验证码：
</div>
<div>
<input type="text" id="checkCode" name="checkCode" size="4"/>
<input id="btnSendCode" type="button" value="发送验证码" onclick="sendMessage()" />
</div>
</form>
</body> 展开
1个回答
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<!DOCTYPE html>
<html>
<META charset=gb2312>
<head>
<title>JS生成验证码</title>
<style>
.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>
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");
var selectChar = new Array(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, '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'); //所有候选组成验证码的字符，当然也可以用中文的
for (var i = 0; i < codeLength; i++) {
var charIndex = Math.floor(Math.random() * 36);
code += selectChar[charIndex];
}
if (checkCode) {
checkCode.className = "code";
checkCode.value = code;
}
}
function validate() {
var inputCode = document.getElementById("input1").value;
if (inputCode.length == 0) {
alert("请输入验证码！");
} else if (inputCode.toLowerCase() != code.toLowerCase()) {
alert("验证码输入错误！");
createCode(); //刷新验证码
} else {
alert("^-^ OK");
}
}
</script>
</head>
<body onload="createCode()">
<form action="#">
<input type="text" id="input1" />
<input type="text" onclick="create()" readonly="readonly" id="checkCode" class="unchanged" style="width: 80px" />
<br />
<input id="Button1" onclick="validate();" type="button" value="确定" />
</form>
<input type="text" id="phone" name="phone" />
<div> <font color="red">
*
</font>
验证码：</div>
<div>
<input type="text" id="checkCode" name="checkCode" size="4" />
<input id="btnSendCode" type="button" value="发送验证码" onclick="sendMessage()" />
</div>
</body>
</html>
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