Solved

Javascript Validate form field for positive integers

Posted on 2004-04-12
4
1,555 Views
Last Modified: 2010-07-27
Greetings!  I'm using the following javascript to make sure that 'totalusers' is not blank.  I'd also like to make sure that only a positive whole integer is used as a value.  How can I further validate the value in that form such that it throws a simple error message to the user is a positive whole integer is not input into the field??

function validate(form){
   
emptyText('* Please enter total number of users to be created.',document.sso_form.totalusers.value);

function emptyText(formRef,fieldName) {
    // returns false if the field contains nothing or only spaces.
    fieldName=trimSpace(fieldName);
    if(fieldName == "" || fieldName == " ") {
        error += formRef + "\n";
        return 0;
    } else {
        return 1;
    }
0
Comment
Question by:gmahler5th
[X]
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
  • 3
4 Comments
 
LVL 35

Accepted Solution

by:
mrichmon earned 500 total points
ID: 10809012
function emptyText(formRef,fieldName) {
    // returns false if the field contains nothing or only spaces.
    fieldName=trimSpace(fieldName);
    if(fieldName == "" || fieldName == " " || IsNaN(ParseInt(fieldname)) || fieldname <= 0 ) {
        error += formRef + "\n";
        return 0;
    } else {
        return 1;
    }
0
 
LVL 35

Expert Comment

by:mrichmon
ID: 10809016
whoops parseInt should have only the I in Int capitalized
0
 
LVL 35

Expert Comment

by:mrichmon
ID: 10809021
and isNaN should have the i in is lower case.
0
 
LVL 63

Expert Comment

by:Zvonko
ID: 10809096
Your parameter names are misleading.

Try this:

function validate(theForm){
  error = "";
  checkNumber('* Please enter total number of users to be created.', theForm.totalusers.value);
  if(error!=""){
    alert("Error occured\n"+error);
    return false;
  } else {
    return true;
  }
}



function checkNumber(errMsg, theValue) {
   // returns false if the field contains nothing or only spaces.
   if(!theValue.match(/^\d+\$)) {
       error += errMsg + "\n";
       return false;
   } else {
       return true;
   }
}


0

Featured Post

Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

Question has a verified solution.

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

This article will give core knowledge of JavaScript and will head in to your first JavaScript program. I am Durvesh Naik and I am here to deal with this series of JavaScript. I will teach you JavaScript in part wise , as its quite boring to read big…
This article discusses how to implement server side field validation and display customized error messages to the client.
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

730 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