以下是之前练习正则表达式时候做的js表单测试.
input里的value用.test()比较以后，处理正则和需求，反馈，代码欠优化，但功能完善，仅供参考学习
html部分
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>新用户注册</title> <link rel="stylesheet" href="./css/regForm.css" type="text/css"> <script type="text/javascript" src="/UploadFiles/2021-04-02/regForm.js">css部分
body{ background:url("../image/10.png") repeat-x; } #section{ width:1002px; height:612px; margin:15px auto; position:relative; } #table{ width:600px; height:550px; background-color:#fff; position:absolute; font-size:18px; line-height:5px; border-radius: 5px; box-shadow: 0 0 15px 2px rgba(0, 0, 0, 0.4); padding: 20px 30px; box-sizing: border-box; width: 80%; margin: 0 10%; } #table .pwstrength{ float:left; height:30px; width:60px; line-height:30px; text-align:center; border-radius:4px; color:#000; } #table .text{ width:215px; height:32px; } #password{ width:215px; height:32px; } #table .lasttext{ font-size:14px; } #table tr td{ width:180px; } #table .icon{ width:175px; height:24px; float:left; background:no-repeat; font-size:12px; color:#000; text-align:right; line-height:24px; }javascript部分，这边使用的是dom2级操作，先封装好事件对象，在IE和非IE的情况下进行操作
//封装一下兼容性函数 var EV ={ //绑定事件兼容 addEvent:function(node,ename,fn){ if(navigator.userAgent.toLowerCase().indexOf("ie")!=-1){ //在ie下添加绑定事件 node.attachEvent("on"+ename,fn); }else{ node.addEventListener(ename,fn,false); } }, removeEvent:function(node,ename,fn){ if(navigator.userAgent.toLowerCase().indexOf("ie")!=-1){ //在ie下添加绑定事件 node.detachEvent("on"+ename,fn); }else{ node.removeEventListener(ename,fn,false); } } } window.onload=function(){ //email地址检测 html事件处理 var eMail = document.getElementById("email"); EV.addEvent(eMail,"blur",checkEmail); function checkEmail(){ var email = document.getElementById("email").value; var emailicon = document.getElementById("emailicon"); var epatt = new RegExp("\\w+@[a-zA-Z0-9]+\\.[a-zA-Z0-9]{2,14}"); //利用正则表达式 if(epatt.test(email)){ emailicon.style.backgroundImage="url('image/tick.png')"; emailicon.innerHTML=""; } else{ emailicon.style.backgroundImage="url('image/cross.png')"; emailicon.innerHTML="请输入正确的邮箱地址!"; emailicon.style.color="#dd0000"; } } //密码强度检测 var pwd =document.getElementById("password"); EV.addEvent(pwd,"blur",checkCode); function checkCode(){ var pwdv =document.getElementById("password").value; var low =document.getElementById("low"); var middle =document.getElementById("middle"); var strong =document.getElementById("strong"); var pwssicon =document.getElementById("phoneicon"); var pwdpatt1 = /\d+/g; //数字 var pwdpatt2 = /[a-zA-Z]+/g; //字母 var pwdpatt3 = /(\W)+/g; //特殊字符 var booldata1,booldata2,booldata3; if(pwdv.length<6){ pwicon.style.backgroundImage="url('image/cross.png')"; pwicon.innerHTML="密码不得少于6位数!"; pwicon.style.color="#dd0000"; } if(pwdv==""){ pwicon.style.backgroundImage="url('image/cross.png')"; pwicon.innerHTML="密码项不能为空!"; pwicon.style.color="#dd0000"; } if(pwdpatt1.test(pwdv)){ booldata1 = true; } if(pwdpatt2.test(pwdv)){ booldata2 = true; } if(pwdpatt3.test(pwdv)){ booldata3 = true; } if(booldata1||booldata2||booldata3){ low.style.backgroundColor="#CB4042"; pwicon.style.backgroundImage="url('image/tick.png')"; pwicon.innerHTML=""; } //强度低 if((booldata1&&booldata2)||(booldata1&&booldata3)||(booldata3&&booldata2)){ middle.style.backgroundColor="#F7C242"; pwicon.style.backgroundImage="url('image/tick.png')"; pwicon.innerHTML=""; //强度中 } if(booldata1&&booldata2&&booldata3){ strong.style.backgroundColor="#227D51"; pwicon.style.backgroundImage="url('image/tick.png')"; pwicon.innerHTML=""; //强度强 } } //检测QQ号码 var qq =document.getElementById("qq"); EV.addEvent(qq,"blur",checkQQ); function checkQQ(){ var qqicon =document.getElementById("qqicon"); var qqtext =document.getElementById("qq").value; var qqpatt = /^[1-9](\d{5,10})$/; if(qqpatt.test(qqtext)){ qqicon.style.backgroundImage="url('image/tick.png')"; qqicon.innerHTML=""; } else{ qqicon.style.backgroundImage="url('image/cross.png')"; qqicon.innerHTML="请输入5至11位数的QQ号码"; qqicon.style.color="#dd0000"; } } //检测手机号 var phone = document.getElementById("phone"); EV.addEvent(phone,"blur",checkPhone); function checkPhone(){ var phoneicon =document.getElementById("phoneicon"); var phonenum = document.getElementById("phone").value; var phonepatt = /^0"url('image/tick.png')"; phoneicon.innerHTML=""; } else{ phoneicon.style.backgroundImage="url('image/cross.png')"; phoneicon.innerHTML="请输入正确的手机号!"; phoneicon.style.color="#dd0000"; } } //检测用户名 var username = document.getElementById("username"); EV.addEvent(username,"blur",checkUser); function checkUser(){ var usercon = document.getElementById("username").value; var usernameicon =document.getElementById("usernameicon"); var unpatt = /[A-Za-z0-9_\-\u4e00-\u9fa5]{6,18}/; if(unpatt.test(usercon)){ usernameicon.style.backgroundImage="url('image/tick.png')"; usernameicon.innerHTML=""; } else{ usernameicon.style.backgroundImage="url('image/cross.png')"; usernameicon.innerHTML="用户名至少大于6个字符!"; usernameicon.style.color="#dd0000"; if(usercon==""){ usernameicon.style.backgroundImage="url('image/cross.png')"; usernameicon.innerHTML="用户名不能为空!"; usernameicon.style.color="#dd0000"; } } //确认密码 var Cfpw =document.getElementById("cfpw"); EV.addEvent(Cfpw,"blur",cfPw); function cfPw(){ var cfpw =document.getElementById("cfpw").value; var cfpwicon=document.getElementById("cfpwicon"); var pwd =document.getElementById("password").value; if(cfpw==pwd&&cfpw!=""){ cfpwicon.style.backgroundImage="url('image/tick.png')"; cfpwicon.innerHTML=""; }else{ cfpwicon.style.backgroundImage="url('image/cross.png')"; cfpwicon.innerHTML="输入的密码不一致!"; cfpwicon.style.color="#dd0000"; } } //MSN var Msn = document.getElementById("msn"); EV.addEvent(Msn,"blur",checkMsn); function checkMsn(){ var msn =document.getElementById("msn").value; var msnicon =document.getElementById("msnicon"); var msnpatt = /\w+@[a-zA-Z0-9]+\.[a-zA-Z0-9]{2,14}/; if(msnpatt.test(msn)){ msnicon.style.backgroundImage="url('image/tick.png')"; msnicon.innerHTML=""; }else{ msnicon.style.backgroundImage="url('image/cross.png')"; msnicon.innerHTML="msn应为正确邮箱地址!"; msnicon.style.color="#dd0000"; } } //办公电话 var officephone =document.getElementById("offphone"); EV.addEvent(officephone,"blur",checkoffPhone); function checkoffPhone(){ var offphone = document.getElementById("offphone").value; var offphoneicon =document.getElementById("offphoneicon"); var offpatt = /(\(\d{3,4}\)|\d{3,4}-)"url('image/tick.png')"; offphonecon.innerHTML=""; }else{ offphoneicon.style.backgroundImage="url('image/cross.png')"; offphoneicon.innerHTML="例:010-88888888"; offphoneicon.style.color="#dd0000"; } } //家庭电话 var Homephone =document.getElementById("homephone"); EV.addEvent(Homephone,"blur",checkHomephone); function checkHomephone(){ var homephone =document.getElementById("homephone").value; var homephoneicon =document.getElementById("homephoneicon"); var homepatt = /(\(\d{3,4}\)|\d{3,4}-)"url('image/tick.png')"; homephonecon.innerHTML=""; }else{ homephoneicon.style.backgroundImage="url('image/cross.png')"; homephoneicon.innerHTML="例:010-88888888"; homephoneicon.style.color="#dd0000"; } } //问题答案 function checkAnswer(){ var answer =document.getElementById("answer").value; var answericon =document.getElementById("answericon"); if(answer!=""){ answericon.style.backgroundImage="url('image/tick.png')"; answercon.innerHTML=""; }else{ answericon.style.backgroundImage="url('image/cross.png')"; answericon.innerHTML="密码问题答案不能为空!"; answericon.style.color="#dd0000"; } } //登录注册 var login =document.getElementById("login"); EV.addEvent(login,"click",Login); function Login(){ var form =document.getElementById("form"); if(username.value==""){ alert("用户名不能为空!"); this.value.focus(); return false; } if(password.value==""){ alert("密码不能为空!"); this.value.focus(); return false; } if(email.value==""){ alert("email不能为空!"); this.value.focus(); return false; } else{ var info =confirm("信息填写完整，确定注册吗"); if(info==true){ window.open("http://www.eduasksz.com","_blank"); } } } } }以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。