javascript制作的简单注册模块表单验证

一个注册框  进行表单验证处理

如图

有简单的验证提示功能

代码思路也比较简单

输入框失去焦点时便检测,并进行处理

表单具有 onsubmit = "return check()"行为,处理验证情况

点击提交表单按钮时,进行最终的验证,达到是否通过表单提交的请求。

先是最基本的html+css部分

<style type="text/css">

body{margin:0;padding: 0;}

.login{position:relative;margin:100px auto;padding:50px 20px;width: 350px;height: 200px;border:1px solid #333;}

.login legend{font-weight: bold;color: green;text-align: center;}

.login label{display:inline-block;width:130px;text-align: right;}

.btn{height: 30px;width:100px;padding: 5px;border:0;background-color: #00dddd;font-weight: bold;cursor: pointer;float: right;}

input{height: 20px;width: 170px;}

.borderRed{border: 2px solid red;}

img{display: none;}

</style>

</head>

<body>

<div class="login">

<form name="form" method="post" action="register.php" onsubmit="return check()">

<legend>【Register】</legend>

<p><label for="name">UserName: </label>

<input type="text" id="name" >

<img src="./img/gou.png" width="20px" height="20px"></p>

<p><label for="password">Password: </label>

<input type="password" id="password" >

<img src="./img/gantan.png" width="20px" height="20px"></p>

<p><label for="R_password">Password Again: </label>

<input type="password" id="R_password" >

<img src="./img/gou.png" width="20px" height="20px"></p>

<p><label for="email">Email: </label>

<input type="text" id="email" >

<img src="./img/gou.png" width="20px" height="20px"></p>

<p><input type="submit" value="Register" class="btn"></p>

</form>

</div>

然后是js的class相关处理函数

function hasClass(obj,cls){ // 判断obj是否有此class

return obj.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));

}

function addClass(obj,cls){ //给 obj添加class

if(!this.hasClass(obj,cls)){

obj.className += " "+cls;

}

}

function removeClass(obj,cls){ //移除obj对应的class

if(hasClass(obj,cls)){

var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');

obj.className = obj.className.replace(reg," ");

}

}

然后是验证各个输入框的值

function checkName(name){ //验证name

if(name != ""){ //不为空则正确,当然也可以ajax异步获取服务器判断用户名不重复则正确

removeClass(ele.name,"borderRed"); //移除class

document.images[0].setAttribute("src","./img/gou.png"); //对应图标

document.images[0].style.display = "inline"; //显示

return true;

}else{ //name不符合

addClass(ele.name,"borderRed"); //添加class

document.images[0].setAttribute("src","./img/gantan.png"); //对应图标

document.images[0].style.display = "inline"; //显示

return false;

}

}

function checkPassw(passw1,passw2){ //验证密码

if(passw1 == "" || passw2 == "" || passw1 !== passw2){ //两次密码输入不为空且不等 不符合

addClass(ele.password,"borderRed");

addClass(ele.R_password,"borderRed");

document.images[1].setAttribute("src","./img/gantan.png");

document.images[1].style.display = "inline";

document.images[2].setAttribute("src","./img/gantan.png");

document.images[2].style.display = "inline";

return false;

}else{ //密码输入正确

removeClass(ele.password,"borderRed");

removeClass(ele.R_password,"borderRed");

document.images[1].setAttribute("src","./img/gou.png");

document.images[1].style.display = "inline";

document.images[2].setAttribute("src","./img/gou.png");

document.images[2].style.display = "inline";

return true;

}

}

function checkEmail(email){ //验证邮箱

var pattern = /^([\.a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;

if(!pattern.test(email)){ //email格式不正确

addClass(ele.email,"borderRed");

document.images[3].setAttribute("src","./img/gantan.png");

document.images[3].style.display = "inline";

ele.email.select();

return false;

}else{ //格式正确

removeClass(ele.email,"borderRed");

document.images[3].setAttribute("src","./img/gou.png");

document.images[3].style.display = "inline";

return true;

}

}

然后为各个输入框添加监听事件:

var ele = { //存放各个input字段obj

name: document.getElementById("name"),

password: document.getElementById("password"),

R_password: document.getElementById("R_password"),

email: document.getElementById("email")

};

ele.name.onblur = function(){ //name失去焦点则检测

checkName(ele.name.value);

}

ele.password.onblur = function(){ //password失去焦点则检测

checkPassw(ele.password.value,ele.R_password.value);

}

ele.R_password.onblur = function(){ //R_password失去焦点则检测

checkPassw(ele.password.value,ele.R_password.value);

}

ele.email.onblur = function(){ //email失去焦点则检测

checkEmail(ele.email.value);

}

最后就是点击提交注册时调用的check()函数了

function check(){ //表单提交则验证开始

var ok = false;

var nameOk = false;

var emailOk = false;

var passwOk = false;

if(checkName(ele.name.value)){ nameOk = true; } //验证name

if(checkPassw(ele.password.value,ele.R_password.value)){ passwOk = true; } //验证password

if(checkEmail(ele.email.value)){ emailOk = true; } //验证email

if(nameOk && passwOk && emailOk){

alert("Tip: Register Success .."); //注册成功

//return true;

}

return false; //有误,注册失败

}

完整代码:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

<meta charset="utf-8">

<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">

<title>Register</title>

<meta name="description" content="">

<meta name="keywords" content="">

<link href="" rel="stylesheet">

<style type="text/css">

body{margin:0;padding: 0;}

.login{position:relative;margin:100px auto;padding:50px 20px;width: 350px;height: 200px;border:1px solid #333;}

.login legend{font-weight: bold;color: green;text-align: center;}

.login label{display:inline-block;width:130px;text-align: right;}

.btn{height: 30px;width:100px;padding: 5px;border:0;background-color: #00dddd;font-weight: bold;cursor: pointer;float: right;}

input{height: 20px;width: 170px;}

.borderRed{border: 2px solid red;}

img{display: none;}

</style>

</head>

<body>

<div class="login">

<form name="form" method="post" action="register.php" onsubmit="return check()">

<legend>【Register】</legend>

<p><label for="name">UserName: </label>

<input type="text" id="name" >

<img src="./img/gou.png" width="20px" height="20px"></p>

<p><label for="password">Password: </label>

<input type="password" id="password" >

<img src="./img/gantan.png" width="20px" height="20px"></p>

<p><label for="R_password">Password Again: </label>

<input type="password" id="R_password" >

<img src="./img/gou.png" width="20px" height="20px"></p>

<p><label for="email">Email: </label>

<input type="text" id="email" >

<img src="./img/gou.png" width="20px" height="20px"></p>

<p><input type="submit" value="Register" class="btn"></p>

</form>

</div>

<script type="text/javascript">

function hasClass(obj,cls){ // 判断obj是否有此class

return obj.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'));

}

function addClass(obj,cls){ //给 obj添加class

if(!this.hasClass(obj,cls)){

obj.className += " "+cls;

}

}

function removeClass(obj,cls){ //移除obj对应的class

if(hasClass(obj,cls)){

var reg = new RegExp('(\\s|^)' + cls + '(\\s|$)');

obj.className = obj.className.replace(reg," ");

}

}

function checkName(name){ //验证name

if(name != ""){ //不为空则正确,当然也可以ajax异步获取服务器判断用户名不重复则正确

removeClass(ele.name,"borderRed"); //移除class

document.images[0].setAttribute("src","./img/gou.png"); //对应图标

document.images[0].style.display = "inline"; //显示

return true;

}else{ //name不符合

addClass(ele.name,"borderRed"); //添加class

document.images[0].setAttribute("src","./img/gantan.png"); //对应图标

document.images[0].style.display = "inline"; //显示

return false;

}

}

function checkPassw(passw1,passw2){ //验证密码

if(passw1 == "" || passw2 == "" || passw1 !== passw2){ //两次密码输入不为空且不等 不符合

addClass(ele.password,"borderRed");

addClass(ele.R_password,"borderRed");

document.images[1].setAttribute("src","./img/gantan.png");

document.images[1].style.display = "inline";

document.images[2].setAttribute("src","./img/gantan.png");

document.images[2].style.display = "inline";

return false;

}else{ //密码输入正确

removeClass(ele.password,"borderRed");

removeClass(ele.R_password,"borderRed");

document.images[1].setAttribute("src","./img/gou.png");

document.images[1].style.display = "inline";

document.images[2].setAttribute("src","./img/gou.png");

document.images[2].style.display = "inline";

return true;

}

}

function checkEmail(email){ //验证邮箱

var pattern = /^([\.a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;

if(!pattern.test(email)){ //email格式不正确

addClass(ele.email,"borderRed");

document.images[3].setAttribute("src","./img/gantan.png");

document.images[3].style.display = "inline";

ele.email.select();

return false;

}else{ //格式正确

removeClass(ele.email,"borderRed");

document.images[3].setAttribute("src","./img/gou.png");

document.images[3].style.display = "inline";

return true;

}

}

var ele = { //存放各个input字段obj

name: document.getElementById("name"),

password: document.getElementById("password"),

R_password: document.getElementById("R_password"),

email: document.getElementById("email")

};

ele.name.onblur = function(){ //name失去焦点则检测

checkName(ele.name.value);

}

ele.password.onblur = function(){ //password失去焦点则检测

checkPassw(ele.password.value,ele.R_password.value);

}

ele.R_password.onblur = function(){ //R_password失去焦点则检测

checkPassw(ele.password.value,ele.R_password.value);

}

ele.email.onblur = function(){ //email失去焦点则检测

checkEmail(ele.email.value);

}

function check(){ //表单提交则验证开始

var ok = false;

var nameOk = false;

var emailOk = false;

var passwOk = false;

if(checkName(ele.name.value)){ nameOk = true; } //验证name

if(checkPassw(ele.password.value,ele.R_password.value)){ passwOk = true; } //验证password

if(checkEmail(ele.email.value)){ emailOk = true; } //验证email

if(nameOk && passwOk && emailOk){

alert("Tip: Register Success .."); //注册成功

//return true;

}

return false; //有误,注册失败

}

</script>

</body>

</html>

以上所述就是本文的全部内容了,希望能够对大家学习javascript表单验证有所帮助。

以上是 javascript制作的简单注册模块表单验证 的全部内容, 来源链接: utcz.com/z/334350.html

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