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js form validation implementation code

小云云

May 22, 2018 pm 04:39 PM

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本文主要和大家分享js表单验证实现代码，运用了正则表达式，进行匹配。希望能帮助到大家。

javascript的17种正则表达式

"^\\d+$"　　//非负整数（正整数 + 0） 
"^[0-9]*[1-9][0-9]*$"　　//正整数 
"^((-\\d+)|(0+))$"　　//非正整数（负整数 + 0） 
"^-[0-9]*[1-9][0-9]*$"　　//负整数 
"^-?\\d+$"　　　　//整数 
"^\\d+(\\.\\d+)?$"　　//非负浮点数（正浮点数 + 0） 
"^(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*))$"　　//正浮点数
"^((-\\d+(\\.\\d+)?)|(0+(\\.0+)?))$"　　//非正浮点数（负浮点数 + 0） 
"^(-(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*)))$"　　//负浮点数
"^(-?\\d+)(\\.\\d+)?$"　　//浮点数 
"^[A-Za-z]+$"　　//由26个英文字母组成的字符串 
"^[A-Z]+$"　　//由26个英文字母的大写组成的字符串 
"^[a-z]+$"　　//由26个英文字母的小写组成的字符串 
"^[A-Za-z0-9]+$"　　//由数字和26个英文字母组成的字符串 
"^\\w+$"　　//由数字、26个英文字母或者下划线组成的字符串 
"^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$"　　　　//email地址 
"^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$"　　//url

当然也可以通过使用JQurey插件实现，我们为了体现实现的过程。

中间的表单应该使用标签来定位，而不是使用p，这样出现的不美观，不能统一牌面。

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
*{
margin: 0px;
padding: 0px;
}
h4{
background-color: aquamarine;
width: 100%;
}
a{
color: red;
}

p{
margin-left: 300px;
}

</style>
<script>
function nameve(){
var name=document.getElementById("name");
var name1=document.getElementById("name1");
var verify=name.value;
if(verify==""){
name1.innerHTML="账号不能为空";
name1.style.color="red";
}
if((verify.length<4&&verify.length>0)||verify.length>16){
name1.innerHTML="长度过长或过短";
name1.style.color="red";
}
if(verify.length>=4&&verify.length<=16){
name1.innerHTML="格式正确";
name1.style.color="green";
}
}
function passve(){
var name=document.getElementById("pass");
var name1=document.getElementById("pass1");
var verify=name.value;
if(verify==""){
name1.innerHTML="密码不能为空";
name1.style.color="red";
}
if((verify.length<6&&verify.length>0)||verify.length>16){
name1.innerHTML="长度过长或过短";
name1.style.color="red";
}
if(verify.length>=6&&verify.length<=16){
name1.innerHTML="格式正确";
name1.style.color="green";
}
}
function passwordve(){
var name=document.getElementById("password");
var name1=document.getElementById("password1");
var pass=document.getElementById("pass");
var verify=name.value;
var verify1=pass.value;
if(verify==verify1){
name1.innerHTML="正确";
name1.style.color="green";
}
   else{
   	name1.innerHTML="两次输入的密码不一致";
   	name1.style.color="red";
   }
}
function ageve(){
var age0=/^((19\d{2})|(20\d{2}))--(0?[1-9]|1[0-2])--(0?[1-9]|[1-2]\d|3[0-1])$/;
var age=document.getElementById("age").value;
var age1=document.getElementById("age1");
if(age0.test(age)==true){
age1.innerHTML="正确";
age1.style.color="green";
}
else{
age1.innerHTML="格式错误";
   	age1.style.color="red";
}
}
function emave(){
var ema0=/^\w+@\w+.[A-Za-z]{2,3}(.[A-Za-z]{2,3})?$/;
var ema=document.getElementById("ema").value;
var ema1=document.getElementById("ema1");
if(ema0.test(ema)==true){
ema1.innerHTML="正确";
ema1.style.color="green";
}
else{
ema1.innerHTML="格式错误";
   	ema1.style.color="red";
}
}
function telve(){
var tel0=/^1\d{10}$/;
var ema=document.getElementById("tel").value;
var ema1=document.getElementById("tel1");
if(tel0.test(ema)==true){
ema1.innerHTML="正确";
ema1.style.color="green";
}
else{
ema1.innerHTML="格式错误";
   	ema1.style.color="red";
}
}

</script>
</head>
<body>
<form action="" method="get">
<h5 id="a-a-为必填内容"><a>*</a>为必填内容</h5>
<h4 id="你的账号信息">你的账号信息</h4>
<p><p><a>*</a>昵称：<input id="name" type="text" onblur="nameve()" /><a id="name1"></a>
<br />英文字符，数字或者下划线，长度为4-16个字符
</p>
</p>
<p><p><a>*</a>密码：<input id="pass" type="password" onblur="passve()" /><a id="pass1"></a>
<br />6-16个字符组成
</p>
</p>
<p><p><a>*</a>重新输入密码：<input id="password" type="password" onblur="passwordve()" /><a id="password1"></a>
<br />
</p>
</p>
<h4 id="你的个人信息">你的个人信息</h4>
<p><p><a>*</a>出生年月：<input id="age"  type="text" onblur="ageve()" /><a id="age1"></a>
<br />日期格式yyyy--mm--dd
</p>
</p>
<p ><p><a>*</a>性别：<input type="radio" id="man" />男<input type="radio" id="woman" />女
<br />
</p>
</p>
<p><p><a>*</a>电子邮件：<input type="email" id="ema" onblur="emave()"/><a id="ema1"></a>
</p>
</p>
<p><p><a>*</a>电话号码：<input type="tel" id="tel" onblur="telve()"/><a id="tel1"></a>
<br />
</p>
</p>
<h4 id="所在地区">所在地区</h4>
<p><p>国家：<select>
<option value="中华人民共和国">中华人民共和国</option>
<option value="华侨">美国</option>
</select>
</p>
</p>
<p><p>省份：<select>
<option value="河南省">河南省</option>
<option value="河北省">河北省</option>
</select>
</p>
</p>
<h4 id="相关服务条例">相关服务条例</h4>
<p><p><input type="checkbox" value="我同意以下条款" />
服务条款
</p>
</p>
<p><p><input type="submit" value="提交注册" />
</p></p>
</form>
</body>
</html>

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