function registrationConfirm() {
   var a = document.registration_form.name.value;
   var b = document.registration_form.nip1.value;
   var c = document.registration_form.nip2.value;
   var d = document.registration_form.nip3.value;
   var e = document.registration_form.nip4.value;
   var f = document.registration_form.city.value;
   var g = document.registration_form.street.value;
   var h = document.registration_form.description.value;

   if( a == "" || b == "" || c == "" || d == "" || e == "" || f == "" || g == "" || h == "" ) {
      if( a == "" ) {
         document.registration_form.name.focus();
         return false;
      } else if( b == "" ) {
         document.registration_form.nip1.focus();
         return false;
      } else if( c == "" ) {
         document.registration_form.nip2.focus();
         return false;
      } else if( d == "" ) {
         document.registration_form.nip3.focus();
         return false;
      } else if( e == "" ) {
         document.registration_form.nip4.focus();
         return false;
      } else if( f == "" ) {
         document.registration_form.city.focus();
         return false;
      } else if( g == "" ) {
         document.registration_form.street.focus();
         return false;
      } else if( h == "" ) {
         document.registration_form.description.focus();
         return false;
      }
   } else {
      if ( window.confirm( "Czy podane informacje są poprawne?" ) ) {
         return true;
      } else {
         return false;
      }
   }
}