Javascript function for validating radio buttons

But this time, the instead of on submitting the form, validations are on field level, i.e. Sure that will be preety interesting to learn and share as well.

If you then check the second radio button, the error message goes away, but the first radio button is still highlighted (via the "error" CSS class).For this we use a variable which is incremented each time a radiobutton is NOT checked then it is compared with the number of radiobuttons in that group, if both are equal a message is displayed.In the case of a checkbox multiple values can be selected so validation is done if none of the checkboxes are ticked.For example if you’re asking a user to select a country the first option is “Select a country” and the name of the countries follow so we need to check if the first option is selected and then display a message to select an option.Notice that the value attribute for the first option is empty if you set it to something else do the same in the if condition in Javascript.

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