function regist_form_pictures(pictures_count) {
  for (i = 1; document.getElementById('form_file_'+i); i++)
    (i <= pictures_count) ? document.getElementById('form_file_'+i).className = 'displayblock' : document.getElementById('form_file_'+i).className = 'displaynone';
}

function m_over(elm) {
  if (document.getElementById(elm))
    document.getElementById(elm).style.border = 'red 1px solid';
}

function m_out(elm) {
  if (document.getElementById(elm))
    document.getElementById(elm).style.border = 'black 1px solid';
}

function goTo(target) { // in the same tab
  window.location.href = target;
}

function goTo2(target) { // in new tab
  window.open(target);
}