validation using javascript

Posted on 2014-02-04
Last Modified: 2014-02-19
Hi Experts,

I  need  to validate input fields using javascript  and  want sample code (using functions)  for the following fields in javascript so that I can use these functions in other pages too.

1)Validate numbers only

a)should not allow alphabets or special characters
b)should not start with Zero
c)maximum numbers allowed is 9

Valid Entries: 11111,123,100000000,1 etc

Invalid Entries:0111(started with zero),1234567891(10 digits) etc

2)Validate Name

a)Should not contain special characters

valid Entries:abc def,ABC DEF, ddsfas dfasdfa etc
Invalid Entries: 12ab asd (contain digits), ##$@ dfasdf (contain special characters) etc
Question by:ksd123
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2

Expert Comment

by:Mahesh Bhutkar
ID: 39832039
You can use regular expressions in your javascript to achieve this.

Here is an good example,

For Good basic knowledge,

For Regular expressions detailings,

Author Comment

ID: 39832075
I need sample working code for the above two input fields using javascript

Accepted Solution

Mahesh Bhutkar earned 500 total points
ID: 39832096
You can use common function for both validation,

function MatchClick(strValue, strMatchPattern) {
      var rematch = new RegExp(strMatchPattern);

      //Test match
            return true;
            return false;

Where strMatchPattern will be pattern/regex for each validation which you have to pass as follows,

//To Validate Name
var alphanum = "^([a-zA-Z0-9 ])*$";

//To Validte Number
var nummax9 =  "^([1-9][0-9]{0,8})*$";

//Invoke MatchClick function
MatchClick("100000000", alphanum);
MatchClick("ddsfas dfasdfa", nummax9 );
Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.


Author Comment

ID: 39835254
Hi Experts,

I am trying to validate below conditions using javascript  and having some issues. can anyone correct the errors. Here is the url validate number

1)Validate numbers only

a)should not allow alphabets or special characters
b)should not start with Zero
c)maximum numbers allowed is 9

Expert Comment

by:Mahesh Bhutkar
ID: 39835297
You can validate using above regular expression ^([1-9][0-9]{0,8})*$ in javascript.

I already provided how to validate in javascript.

Expert Comment

by:Mahesh Bhutkar
ID: 39835306
You are passing text1 element & not it's value.

Change it to,

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

When crafting your “Why Us” page, there are a plethora of pitfalls to avoid. Follow these five tips, and you’ll be well on your way to creating an effective page.
In threads here at EE, each comment has a unique Identifier (ID). It is easy to get the full path for an ID via the right-click context menu. However, we often want to post a short link within a thread rather than the full link. This article shows a…
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.
In a recent question ( here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question