I have a form with 3 input box and all the input box does not have id, name field in it. So if i enter value in it, How can i check the value of input box without id and nam
It looks like you want to do form validation. For form validation in HTML5, check this resource out:
http://www.the-art-of-web.com/html/html5-form-validation/
Basically, you will be able to get by with some validations just by using HTML attributes, and without using JavaScript.