jQuery Example of Regular Expression Based Form Validation Feature
- 2021-07-13 04:16:28
- OfStack
This paper illustrates the form validation function based on regular expressions in jQuery. Share it for your reference, as follows:
<!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 http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Test</title>
<script type="text/javascript" language="javascript" src="jquery-1.7.2.min.js"></script>
<script type="text/javascript" language="javascript" >
function validata(){
if($("#username").val()==""){
alert(" Please enter a name ");
return false;
}
if($("#password").val()==""){
alert(" Please enter your password ");
return false;
}
if($("#telephone").val()==""){
alert(" Please enter a phone number ");
}
if($("#email").val()==""){
$("#email").val("shuangping@163.com");
}
}
function isInteger(obj){
reg=/^[-+]?\d+$/;
if(!reg.test(obj)){
$("#test").html("<b>Please input correct figures</b>");
}else{
$("#test").html("");
}
}
function isEmail(obj){
reg=/^\w{3,}@\w+(\.\w+)+$/;
if(!reg.test(obj)){
$("#test").html("<b> Please enter the correct email address </b>");
}else{
$("#test").html("");
}
}
function isString(obj){
reg=/^[a-z,A-Z]+$/;
if(!reg.test(obj)){
$("#test").html("<b> Only characters can be entered </b>");
}else{
$("#test").html("");
}
}
function isTelephone(obj){
reg=/^(\d{3,4}\-)?[1-9]\d{6,7}$/;
if(!reg.test(obj)){
$("#test").html("<b> Please enter the correct telephone number! </b>");
}else{
$("#test").html("");
}
}
function isMobile(obj){
reg=/^(\+\d{2,3}\-)?\d{11}$/;
if(!reg.test(obj)){
$("#test").html(" Please enter the correct mobile phone ");
}else{
$("#test").html("");
}
}
function isUri(obj){
reg=/^http:\/\/[a-zA-Z0-9]+\.[a-zA-Z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/;
if(!reg.test(obj)){
$("#test").html($("#uri").val()+" Please enter the correct inernet Address ");
}else{
$("#test").html("");
}
}
//document Load finished executing
$(document).ready(function() {
// do something here
// Interlaced color change function
$("p").each(function(i){
this.style.color=['red','green','blue','black'][i%2]
});
//eq(2) Get $("p") The first of the set 3 Elements
$("p").eq(2).click(function(){$("#display").css("color","blue")});
// All test In p Styles are attached "over" .
$("#test>p").addClass("over");
//test The last of the 1 A p Style attached "out" .
$("#test p:last").addClass("out");
// Choosing the same-level elements has not been understood yet
//$('#faq').find('dd').hide().end().find('dt').click(function()
// Select Parent Element
$("a").hover(
function(){$(this).parents("p").addClass("out")},
function(){$(this).parents("p").removeClass("out")})
//hover Mouse hover effect, toggle Switch the function to be called every time you click ,
//trigger(eventtype): In every 1 Some kind of event is triggered on the matching elements ,
//bind(eventtype,fn) , unbind(eventtype): Event binding and unbinding from each 1 Events that remove bindings from (add) a matching element.
// Continuous writing of method
$("#display").hover(function(){
$(this).addClass("over");
},function(){
$(this).removeClass("over");
})
.click(function(){alert($("#display").text())});
if($.browser.msie){// Judge the browser, if ie The following functions are performed
// Focus
$("input[@type=text],textarea,input[@type=password]")
.focus(function(){$(this).css({background:"white",border:"1px solid blue"})})
// You can also write it in conjunction like this ,
//.blur(function(){$(this).css({background:"white",border:"1px solid black"})})
// Lose focus
//css Styles are available through the addClass() To add
$("input[@type=text],textarea,input[@type=password]")
.blur(function(){$(this).css({background:"white",border:"1px solid black"});});
}
});
</script>
<style type="text/css">
.over{
font-size:large;
font-style:italic;
}
.out{
font-size:small;
}
</style>
</head>
<body >
<div id="display">demo</div>
<div id="test">
<p>adfa<a>dfasfa</a>sdfasdf</p>
<p>adfadfasfasdfasdf</p>
<p>adfadfasfasdfasdf</p>
<p>adfadfasfasdfasdf</p>
</div>
<form id="theForm">
isString<div><input type="text" id="username" onblur="isString(this.value)"/></div>
isInteger<div><input type="text" id="password" onblur="isInteger(this.value)"/></div>
isTelephone<div><input type="text" id="telephone" onblur="isTelephone(this.value)"/></div>
isMobile<div><input type="text" id="mobile" onblur="isMobile(this.value)"/></div>
isEmail<div><input type="text" id="email" onblur="isEmail(this.value)"/></div>
isUri<div><input type="text" id="uri" onblur="isUri(this.value)"/></div>
<div><input type="button" value="Validata" onclick="return validata();" /></div>
</form>
</body>
</html>
Attachment: Commonly used js verification functions:
Site Home Form js:
function checkVaild()
{
var User=$("#Mobile").val();
var reg=/^(\+\d{2,3}\-)?\d{11}$/;
if (User=="")
{
alert(" Mobile phone number cannot be empty ") ;
return false;
}
if(!reg.test(User)){
alert(" Incorrect entry of mobile phone number ") ;
return false ;
}
return true ;
}
Filtering Special Characters in Regular Expressions;
function doValidate(value)
{
vkeyWords=/^[^`~!@#$%^&*()+=|\\\][\]\{\}:;'\,.<>/?]{1}[^`~!@$%^&()+=|\\\][\]\{\}:;'\,.<>?]{0,19}$/;
if(value==null || value=="")
{
alert(" Please enter the correct query parameters ");
return false;
}
if(!vkeyWords.test(value))
{
alert(" You have entered incorrect query parameters , Please re-enter !");
return false;
}
return true;
}
PS: Here are two very convenient regular expression tools for your reference:
JavaScript Regular Expression Online Test Tool:
http://tools.ofstack.com/regex/javascript
Regular expression online generation tool:
http://tools.ofstack.com/regex/create_reg
For more information about jQuery, please see the topics on this site: "jQuery Regular Expression Usage Summary", "jQuery String Operation Skills Summary", "jQuery Operation xml Skills Summary", "jQuery Extension Skills Summary", "jquery Selector Usage Summary" and "jQuery Common Plugins and Usage Summary"
I hope this article is helpful to everyone's jQuery programming.