Question

I have a select with some options. But this select section is not always shown. It is only shown if a user has clicked another element. If the user submits the form than the default values (first entries) of the select are also submitted. How can I clear the select value?

I tried it with $('#ExpM').val('') and also with this:

    $('#Form').submit(function() {
        if (!$('#radio_dump').is(':checked')){
            $('#ExpM').selectedIndex=-1;
            $('#ExpY').selectedIndex=-1;
        }
    });

But the values are also sent in the post. These values are not required. What can I do?

Answer 1

foreach($_POST as $key => $value)
if ( empty($value) ) unset($_POST[$key]);