Simple form validation (JS, jquery)

Last Update:2014-08-19 Source: Internet

Author: User

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

//javascript CodefunctionValform () {varUsername=document.getelementbyid ("username"); varPwd=document.getelementbyid ("pwd"); varRepwd=document.getelementbyid ("Repwd"); varEmail=document.getelementbyid ("Email"); varAge=document.getelementbyid ("Age"); varCardid=document.getelementbyid ("Cardid");if(username.value== "") {alert ("User name cannot be empty"); return false; }Else if(username.value.length<4| | Username.value.length>16) {alert ("User name length does not conform to the rules!" \ nthe user name should be 4-16 characters long "); return false; }Else if(pwd.value== "") {alert ("Password cannot be empty"); return false; }Else if(pwd.value!=repwd.value) {Alert ("Password Inconsistent"); return false; }Else if(Email.value.indexOf (".") <0| | Email.value.indexOf ("@") <0) {alert ("Mailbox Error"); return false; }Else if(parseint (Age.value) <18&&parseint (age.value) >80) {alert ("Wrong Age"); return false; }Else if(Reg.test (cardid.value) = =false) {alert ("ID card is illegal."); return false; }Else{document.forms[0].submit (); return false; }    }

Jquery
$(function(){        $("#regUser"). Click (function(){            if($ ("#username"). val () = = "" | | $ ("#username"). Val (). length<4) {alert ("User name does not meet the requirements")                }Else if($ ("#pwd"). Val (). length<6) {alert ("Password does not meet the requirements"); }Else if($ ("#repwd"). Val ()!=$ ("#pwd"). Val ()) {alert ("Password Inconsistent")                }Else if($ ("#email"). Val (). indexOf ("@") <0| | $ ("#email"). Val (). IndexOf (".") <0) {alert ("Bad mailbox Format")                    }Else if($ ("#age"). Val () <18| | $ ("#age"). Val () >80) {alert ("Age does not meet the requirements")                }Else{window.location.href= "Jquery1.html"; }            })        })

Body Content

<body><form action= "JS instance. html" method= "POST" > <table border= "0" > <tr> <td> User name </ td> <td><input type= "text" name= "username" id= "username"/></td> <td>&nbsp;</t d> </tr> <tr> <td> password </td> <td><input type= "password" name= "pwd" id= "pw      D "/></td> <td>&nbsp;</td> </tr> <tr> <td> repeat password </td> <td><input type= "Password" name= "repwd" id= "repwd"/></td> <td>&nbsp;</td> </ tr> <tr> <td> Email:</td> <td><input type= "text" name= "email" id= "email"/></ td> <td>&nbsp;</td> </tr> <tr> <td> age:</td> <td><      Input type= "text" name= "Age" id= "age"/></td> <td>&nbsp;</td> </tr> <tr> <td><a href= "#" id= "Reguser" > Registration </a></td> <td><a href= "#" > Reset </a></td> </tr> &lt ;/table></form></body>

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.

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

Simple form validation (JS, jquery)

Contact Us

A Free Trial That Lets You Build Big!

Sales Support

After-Sales Support