<script type=\"text/javascript\">
         <!--
         function check() {
           // form validation check
           var formValid = true;
           var f = document.register;
           if ( f.username.value == '' ) {
             alert('Prosze wybrac pozycje z listy!');
             f.username.focus();
             formValid = false;
           }
           return formValid;
         }
         //-->
</script>