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使用正则表达式判断登录是否符合格式
效果图如下:
如图,使用正确的格式会报正确,格式不符合则报错误
下面是代码
HMTL代码
<div>用户名:<input type="text" id="userName"/><span id="userNameReg"></span></div>
<div>密码:<input type="password" id="pwd" /><span id="pwdReg"></span></div>
<div>确认密码:<input type="password" id="affirmPwd" /><span id="affirmPwdReg"></span></div>
<div>邮箱:<input type="text" id="mailbox" /><span id="mailboxReg"></span></div>
<div>手机号:<input type="text" id="cellphone" /><span id="cellphoneReg"></span></div>
<div>身份证号:<input type="text" id="identityCard" /><span id="identityCardReg"></span></div>
<div>地址:<input type="text" id="address" /><span id="addressReg"></span></div>
<div><input type="button" value="校验" onclick="regBtnClick()"/></div>
JS代码
function regBtnClick(){
reg("userName",/^[A-Z]{1}[A-Za-z_]{5,19}$/);
reg("pwd",/^[A-Z]{1}[A-Za-z0-9]{7,14}/);
reg("affirmPwd",/^[A-Z]{1}[A-Za-z0-9]{7,14}/);
reg("mailbox",/\w[-\w.+]*@([A-Za-z0-9][-A-Za-z0-9]+\.)+[A-Za-z]{2,14}/);
reg("cellphone",/0?(13|14|15|18|17|19)[0-9]{9}/);
reg("identityCard",/^[1-9]{1}[0-9]{17}$|[1-9]{1}[0-9]{16}(X|x)$/);
reg("address",/^[\u4E00-\u9FA5][\u4e00-\u9fa5-A-z0-9]+$/);
}
导入 yanzheng.js
function reg(eleId,rule){
var str =document.getElementById(eleId).value;
var verify1=rule;
var result1=verify1.test(str.trim());
if(result1 && str!=""){
document.getElementById(eleId+"Reg").innerHTML = "正确";
document.getElementById(eleId+"Reg").style.color = "green";
}else{
document.getElementById(eleId+"Reg").innerHTML = "你输入的格式有错误";
document.getElementById(eleId+"Reg").style.color = "red";
}
}