//下面是在前台jsp页面不用导工具的情况下制作的验证码的基本代码
$(function(){
//创建验证码
createCode();
jQuery.validator.addMethod(
"IsName",
function(value){
var reg = /^\w{4,20}$/
return reg.test(value)
},
"this is check username"
);
//制作验证码
var code;
function createCode() {
code = "";
var codeLength = 6; //验证码的长度
var checkCode = document.getElementById("checkCode");
var codeChars = 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',
'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 charNum = Math.floor(Math.random() * 52);
code += codeChars[charNum];
}
if (checkCode)
{
checkCode.className = "code";
checkCode.innerHTML = code;
}
}
//验证验证码
function deng()
{
var inputCode = document.getElementById("inputCode").value;
if (inputCode.length <= 0)
{
$("#check").html("");
$("#check").append("<b>请输入验证码</b>");
}
else if (inputCode.toUpperCase() != code.toUpperCase())
{
$("#check").html("");
$("#check").append("<b>验证码输入有误</b>");
$("#login").attr("disabled","disabled");
}
else
{
$("#check").html("");
$("#check").append("<b>验证码正确</b>");
$("#login").removeAttr("disabled");
}
}
}
//下面是在调用实现的方法
<div onload="createCode()" class="col-md-8 con-name">
<form id="form1" runat="server" onsubmit="validateCode()">
<div>
<table border="0" cellspacing="5" cellpadding="5" >
<tr>
<td><div style="margin-left: 30px;color: #CD8162" id="checkCode" onclick="createCode()" ></div></td>
</tr>
<tr>
<td><input style="float:left;" type="text" id="inputCode" onmouseout="validateCode()" /></td>
</tr>
<tr><td id="check" align="center"></td></tr>
</table>
</div>