Validation (checking ) of period button on submit of Form
Period buttons are used when the visitor has to select one of the many options available. For example in a signup form the visitor has to select the sex by clicking on Male or Female selection. In different cases there can be more than two options also. For example mode of payment can be any one of the options saying cash, check, draft, credit card, or wire transfer. We can select one of the options out of many choices. We can check or validate the submission by checking any selection is made or not. The form will not be submitted if no selection is made.