Home > Developer > JavaScript

Implementation Code of Form Verification made by jquery plug-in

Source: Internet
Author: User
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

First go to the page code:
Copy codeThe Code is 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>
<Title> </title>
<Script type = "text/javascript" src = "Scripts/jquery-1.8.0.min.js"> </script>
<Script type = "text/javascript" src = "Scripts/jquery. formCheck. js"> </script>
<Script type = "text/javascript">
$ (Document). ready (function (){
$ ('. Formtocheck'). formCheck ();
});
</Script>
<Style type = "text/css">
Form
{
Width: 300px;
}
Label
{
Position: absolute;
}
Input: not (. submit), textarea
{
Margin-left: 100px;
Width: 200px;
}
. Submit
{
Margin-left: 100px;
}
. Error
{
Border: 1px solid red;
}
</Style>
</Head>
<Body>
<Form class = "formToCheck" id = "formToCheck" method = "get" action = "#">
<Fieldset>
<Legend> a simple form </legend>
<P>
<Label for = "fname">
* First name </label>
<Input id = "fname" class = "required" name = "fname"/>
</P>
<P>
<Label for = "lname">
Last name </label>
<Input id = "lname" name = "lname"/>
</P>
<P>
<Label for = "email">
* Email </label>
<Input id = "email" name = "email" class = "required email"/>
</P>
<P>
<Label for = "comment">
* Comment </label>
<Input id = "comment" name = "comment" class = "required"/>
</P>
<P>
<Label for = "email">
* Email </label>
<Input id = "submit" type = "submit" class = "submit" value = "submit"/>
</P>
</Fieldset>
</Form>
</Body>
</Html>

We have defined a form and several input boxes. Note the class attribute. Some of them are class = "required", which indicates that this item is required; class = "required email" indicates that this item is required and must comply with the email format. The input box without class definition is not verified. The plug-in code is as follows:
Copy codeThe Code is as follows:
(Function ($ ){
$. Fn. formCheck = function (options ){
Var defaults = {
ErrorClass: 'error'
};
Var options = $. extend (defaults, options );
Return this. each (function (){
Var form = $ (this );
// If it is not a from form, direct return is not performed.
If (! Form. is ('form ')){
Return;
}
// Verification is performed only when the form is submitted.
Form. submit (function (){
Var errorFlag = false;
// Obtain all input controls in the form and process them one by one
$ (': Input', this). each (function (index, item ){
// Obtain the current object
Var element = $ (item );
// Remove a style
Element. removeClass (options. errorClass );
// Required verification. The value cannot be blank.
If (element. hasClass ('required') & element. val (). length = 0 ){
ErrorFlag = true;
Element. addClass (options. errorClass );
}
// Digit Verification
If (element. hasClass ('number') & element. val (). length> 0 &&! /^ \ D + $/. test (element. val ())){
ErrorFlag = true;
Element. addClass (options. errorClass );
}
// Email Verification
If (element. hasClass ('email ') & element. val (). length> 0
&&! /^ [A-zA-Z0-9. _-] + @ [a-zA-Z0-9. -] + \. [a-zA-Z] {2, 4} $ /. test (element. val ())){
ErrorFlag = true;
Element. addClass (options. errorClass );
}
// Verify the numeric Length
Var num = this. className. match (/min (\ d +)/I );
If (num & element. val (). length <num [1]) {
ErrorFlag = true;
Element. addClass (options. errorClass );
}
});
Return! ErrorFlag;
});
});
};
}) (JQuery );

Demo: jQuery. plugin. formcheck
This is the end of today's course.

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
code of registration form in php implementation of ajax in php list of things made in china form validation example in jquery games made by supercell fitbit made by apple made by samsung
Related Article
Ajax and 302 response code test_javascript-js tutorial

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More