function validateEmail( em ) {
    var ok = false;
    var em_p = em.split( '@' );
		if( (em_p.length == 2) && (em_p[ 0 ] != '') && (em_p[ 1 ] != '') ) {
			em_r = em_p[ 1 ].split( '.' );
			if( (em_r.length >= 2) && (em_r[ 0 ] != '') && (em_r[ 1 ] != '') ) { ok = true; }
    }
    return ok;
  }
  
  function doVoting() {
    window.open( '', 'windowAnketa', 'width=400,height=285,resizable=0,scrollbars=0' );
    document.anketa.submit();
  }
  
  function showRes( id ) {
    window.open( 'anketa.php?id=' + id, 'windowAnketa', 'width=400,height=285,resizable=0,scrollbars=0' );
  }

  function crtajMejl( id, u, d ) {
    var el = document.getElementById( id );
    var m = u + '@' + d;
    el.innerHTML = '<a href="mailto:' + m + '">' + m + '</a>';
  }
  
  function posaljiPoruku() {
    if( checkKontaktForm() ) { document.kontakt_form.submit(); }
  }
  
  function checkKontaktForm() {
    var err = '';
    var ok = true;
    if( document.kontakt_form.imeprezime.value.length == 0 ) { err += '- ime i prezime\n'; }
    if( document.kontakt_form.email.value.length == 0 ) { err += '- e-mail\n'; }
    else if( !validateEmail( document.kontakt_form.email.value ) ) { err += '- ispravan e-mail\n'; }
    if( document.kontakt_form.poruka.value.length == 0 ) { err += '- poruka\n'; }
    if( err != '' ) {
      ok = false;
      alert( 'Niste upisali ove podatke:\n\n' + err );
    }
    return ok;
  }