Thank you for your answer. i use the version 1.2.5 of Cred
i have added the following js but nothing happens. The Select Field "wpcf-abholort-treffpunkt" should be required if in the Select-Field "wpcf-abholort-bitte-auswaehlen" "Flughafen Wien-Schwechat" is selected.
jQuery(function( $ ) { // Validation $( 'form' ).submit( function() { // content if ( $( "select[name='wpcf-abholort-bitte-auswaehlen']" ).val() == 'Flughafen Wien-Schwechat' ) { $( "select[name='wpcf-abholort-treffpunkt']" ).focus(); alert( "The content is required" ); return false; } } ); } );