There are two main methods for validating forms: (usually done using Java Script).

Using vanilla Java Script we can prevent form submission as follows: All this does is confirm before submitting the form that the checkbox is checked.If its unchecked, it will throw an alert(); if its checked it will submit via post through php and go on as normal.Guys you can do this kind of validation very easily. For example, if I have a page lined with checkboxes (all with the same "name" value), I want to make sure that at least one of the boxes is checked... I'm a little confused about what post request is sent if a checkbox is not checked, and how javascript should catch it. I usually work with PHP so sadly don't have some basic JS principles down.