Validate a form using JavaScript

Question

I am a beginner and I have written a code for validating the form as:

function validateForm(){
var x=document.forms[\"myForm\"][\"fname\"].value;
if (x==null ||          


        

Answer 1

This is the exact solution to my problem. Where the user gets some kind of notification when the object losses focus:

The HTML form is:

First name: 

The div can be designed in CSS to red color to get user attention and many more tricks can be played.