How to make Simple Validate Form with JavaScript

It is very simple to make validate a form with javascript. There we are coded a little more javascript and HTML. Hello friends, in this tutorial, we are making a simple validation form with javascript.

1. Simple Validation Form

Demo

2. Retype Password Validation

Demo

3. JavaScript Number Validation

NaN refers to Not-a-Number which is used to determine whether a value is an illegal Number.

Demo

4. JavaScript Image Validation

Demo

5. JavaScript Email Validation

The lastIndexOf() method returns the position of the last occurrence of a specified value in a string, whereas indexOf() returns the position of the first occurrence of a specified value in a string.

Demo