Checking for Blank Form Fields

If you use an HTML form at your Web site, you may not want anyone to submit the form if required fields are left blank. You can check for blank form fields with JavaScript on the client side and keep any forms from being submitted if they don’t meet your requirements. What you need to do is attach a checking function to the Submit button of your form, like so:

 

The function formCheck() should go in the section of the document, where myForm is the name of the form, myElement is the name of the element being checked, and 2 is the minimum number of characters allowed in the field:

 function formCheck() {	var not_blank = true;	if (document.myForm.myElement.value.length < 2) {		not_blank = false;	}	return not_blank;}

You can also expand the function to cover as many form elements as you'd like, and add a pop-up error message to explain to the user why the form was not submitted.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may

man on floor with data

DevX Quick Guide to Data Ingestion

One of the biggest trends of the 21st century is the massive surge in internet usage. With major innovations such as smart technology, social media, and online shopping sites, the internet has become an essential part of everyday life for a large portion of the population. Due to this internet

payment via phone

7 Ways Technology Has Changed Traditional Payments

In today’s digital world, technology has changed how we make payments. From contactless cards to mobile wallets, it’s now easier to pay for goods and services without carrying cash or using a checkbook. This article will look at seven of the most significant ways technology has transformed traditional payment methods.