Form validation – necessary part of each modern html form to prevent spamming and support website visitors to fulfill all required information your form must have before send data to email etc therefore jQuery validation plugins must have in web developer toolkit. With Html5 and Css3 elements you can create basic validation of your form but why limit yourself, your creativity with classic popup or other standard notification.
There are many ways how to add a validation function to website form – most easiest way is to add form that have build in validation function. Most advanced option is to create your own html form and add custom jQuery verification code. Other way is to use jQuery validation plugin by uploading jQuery library to your website and configure it.