MediaWiki:Gadget-FormCheck.js

$('#TfacsSubmission').ready( function() {
    function checkForm() {
        $('#TfacsSubmission input, #TfacsSubmission select, #TfacsSubmission textarea').prop('disabled', false);
        if( $('select[name="retreattype[]"]').val() === 'Three-year retreat') {
            if( $('.MustField, .ThreeMustField').filter(function() { return this.value === ''; }).length === 0 ) {
                console.log("All filled, setting status to 'Filled'.");
                $('input[name="status"]').val("Filled");
            } else {
                console.log("Fields missing... Three-year retreat");
                $('input[name="status"]').val("Saved");
            }
        } else if( $('select[name="retreattype[]"]').val() === 'Solitary hermitage') {
            if( $('.MustField, .SolMustField').filter(function() { return this.value === ''; }).length === 0 ) {
                console.log("All filled, setting status to 'Filled'.");
                $('input[name="status"]').val("Filled");
            } else {
                console.log("Fields missing... Solitary hermitage");
                $('input[name="status"]').val("Saved");
            }
        } else {
            console.log("Retreat type not set." + $('select[name="retreattype[]"]').val());
        }
    }
    if( ($('input[name="status"]').val() === 'Submitted') || $('input[name="status"]').val() === 'Completed' ) {
        $('#TfacsSubmission input, #TfacsSubmission select, #TfacsSubmission textarea').not('#TfacsSubmitApplication').prop('disabled', true);
    } else {
        jQuery(document).ready( checkForm() );
        $('#TfacsSubmission input, #TfacsSubmission select, #TfacsSubmission textarea').on( "keyup", checkForm() );
    }
})