Using html elements on ask page and validate it before form submission

Summary

Using html elements on ask page and validate it before form submission

Content

I have a requirement to add some html form elements and not to use the form input widgets on Ask page, where I want to add validation for these html elements, even after adding the validation, the form submits by bypassing the validation. Is there any way to stop the submission of form and do the validation first and if everything is valid then only submit the form?