Solved

how to write java script validate function

Posted on 2006-06-21
1
169 Views
Last Modified: 2010-05-18
Hi:

Currently I am working on an customer order form. The email address should be entered when the user submits. So I need add something like "input type=submit value=submit onclick="validate()"  " right? My question is how to write the validate() so that the user won't submit?
0
Comment
Question by:ly_uwo
1 Comment
 
LVL 14

Accepted Solution

by:
boonleng earned 200 total points
ID: 16951896
You need to return true or false in the javascript function.

Example:
<script>
function validate() {
    if (no error) {
        return true;
    } else {
        return false;
    }
}
</script>

<form onsubmit="return validate()">

Note: is best perform validation on onSubmit instead of onclick on the button. This is to cater for user press 'Enter' key.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Learn how to PXE Boot both BIOS & UEFI machines with DHCP Policies and Custom Vendor Classes
When it comes to protecting Oracle Database servers and systems, there are a ton of myths out there. Here are the most common.
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …
Finds all prime numbers in a range requested and places them in a public primes() array. I've demostrated a template size of 30 (2 * 3 * 5) but larger templates can be built such 210  (2 * 3 * 5 * 7) or 2310  (2 * 3 * 5 * 7 * 11). The larger templa…

840 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